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Nerve cells of human spinal cord stained to show Nissl bodies. Labels: D, dendrites; A, axons; C, implantation cone; N, nucleus; M, nucleolus.

Neuron of Spinal Cord

Nerve cells of human spinal cord stained to show Nissl bodies. Labels: D, dendrites; A, axons; C, implantation…

Reconstruction of peripheral nerves of human embryo of five weeks.

Peripheral Nerves of Human Embryo

Reconstruction of peripheral nerves of human embryo of five weeks.

Section of human cornea.

Section of Cornea

Section of human cornea.

A human eye, used for sight, pictured with an eyebrow.

Eye

A human eye, used for sight, pictured with an eyebrow.

The hand is the intricate, multi-fingered body part normally located at the end of each arm of a human.

Hand Pointing

The hand is the intricate, multi-fingered body part normally located at the end of each arm of a human.

In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder.

Transverse Section of Ureter

In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder.

General view of the human skeleton.

Skeleton

General view of the human skeleton.

Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between endochondral and periosteal bone; c, perichondral bone; d, remains of area of calcification; e, endochondral bone; f, f', blood vessels; g, g', developing Haversian spaces; h, marrow; i, blood vessels.

Developing Bone

Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between…

Osteoblasts from the parietal bone of a human embryo thirteen weeks old. Labels: a, bony septa with the cells of he lacunae; b, layers of osteoblasts; c, the latter in transition to bone corpuscles.

Osteoblasts from Embryo

Osteoblasts from the parietal bone of a human embryo thirteen weeks old. Labels: a, bony septa with…

The human flea (Pulex irritans) is a parasitic insect that actually has several hosts despite its name.

Human Flea

The human flea (Pulex irritans) is a parasitic insect that actually has several hosts despite its name.

"The branch vascular bundles will be distinctly seen, resembling in some respects the arteries and veins of the human body. A careful examination will show that these are also covered with a very fine lace-work of cells under and over them, and interspersed among the latter will be seen a vast assemblage of translucent dottings, each having an opening across it corresponding to those of the stomates under which they were situated before dissection." -Watts, 1874

Microscopic view of a leaf

"The branch vascular bundles will be distinctly seen, resembling in some respects the arteries and veins…

"These fragile creatures are able to make long voyages on the surface of the sea. Their nature is such that they are required to keep constantly moving in order to sustain themselves in the fluid which they inhabit. There is a double movement of their light skeletons, which may be compared to the action of respiration in the human hest."

Rhyzostoma Cuvierii

"These fragile creatures are able to make long voyages on the surface of the sea. Their nature is such…

A cave is a natural underground void large enough for a human to enter.

Cave

A cave is a natural underground void large enough for a human to enter.

An illustration of a cliff with with a cave. A cave is a natural underground void large enough for a human to enter.

Cave

An illustration of a cliff with with a cave. A cave is a natural underground void large enough for a…

Purkinjean cell from human cerebellum, as seen in a plane transverse to the long axis of a cerebellar folium. Labels: a, axon; clt., collaterals.

Purkinjean Cell from Cerebellum

Purkinjean cell from human cerebellum, as seen in a plane transverse to the long axis of a cerebellar…

Longitudinal section through human nail and its nail groove (sulcus).

Longitudinal Section Through Fingernail

Longitudinal section through human nail and its nail groove (sulcus).

Transverse section through human nail and its nail groove (sulcus).

Transverse Section Through Fingernail

Transverse section through human nail and its nail groove (sulcus).

Section of human pancreas, showing pancreatic islands.

Section of Pancreas

Section of human pancreas, showing pancreatic islands.

A bust is a sculpted or cast representation of the upper part of the human figure, depicting a person's head and neck, as well as a variable portion of the chest and shoulders. The piece is normally supported by a plinth. These forms recreate the likeness of an individual. These may be of any suitable material (such as marble, bronze or clay).

Bust of Man

A bust is a sculpted or cast representation of the upper part of the human figure, depicting a person's…

Section through the central canals of the spinal cord of a human embryo, showing ependymal (A) and neuroglial cells (B).

Section Through Spinal Cord Showing Neuroglial Cell

Section through the central canals of the spinal cord of a human embryo, showing ependymal (A) and neuroglial…

Human fetus in the third month of development, with the brain and spinal cord exposed from behind.

Brain and Spinal Cord of Fetus

Human fetus in the third month of development, with the brain and spinal cord exposed from behind.

Two stages in the development of the human brain. A. Brain of an human embryo of the third week. B. Brain of an embryo of five weeks.

Development of Human Brain

Two stages in the development of the human brain. A. Brain of an human embryo of the third week. B.…

Two cross sections through the forebrain. A. Through the forebrain of the early human embryo. B. Through the forebrain and optic vesicles of Lepidosteus embryo of eight days.

Section Through Forebrain of Human and Lepidosteus Embryos

Two cross sections through the forebrain. A. Through the forebrain of the early human embryo. B. Through…

The brain of a human embryo in the fifth week. A, Brain as seen in profile. B, Mesial section through the same brain. Labels: M, mammillary eminence, Tc, tuber cinereum; Hp, Hypophysis (pituitary diverticulum from buccal cavity); Opt, optic stalk; TH, optic thalamus; Tg, tegmental part of mesencephalon; Ps, pars subtalamica; Cs, corpus striatum; FM, foramen of Monro; L, lamina terminalis; RO, recessus opticus; RI, recessus infundibuli.

Brain of Embryo

The brain of a human embryo in the fifth week. A, Brain as seen in profile. B, Mesial section through…

Profile view of brain of a human embryo of ten weeks. The various cranial nerves are indicated by numerals. A, Cerebral diverticulum of pituitary body. B, Buccal diverticulum of pituitary body.

Brain of Embryo

Profile view of brain of a human embryo of ten weeks. The various cranial nerves are indicated by numerals.…

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Front view of Medulla, Pons, and Mesencephalon

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Back View of Medulla, Pons, and Mesencephalon

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral View of Medulla, Pons, and Mesencephalon

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Transverse section through the closed part of the human medulla immediately above the decussation of the pyramids.

Transverse Section Through Closed Part of Medulla

Transverse section through the closed part of the human medulla immediately above the decussation of…

Transverse section through the human medulla in the lower olivary region.

Section Through Medulla in Olivary Region

Transverse section through the human medulla in the lower olivary region.

Transverse section through the the middle of the olivary region of the human medulla or bulb.

Section Through Medulla in Olivary Region

Transverse section through the the middle of the olivary region of the human medulla or bulb.

Section through the lower part of the human pons varolii immediately above the medulla.

Section Through Pons Varolii

Section through the lower part of the human pons varolii immediately above the medulla.

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum of a sheep embryo. B, Transverse section through the hinder part of the cerebellum of a sheep embryo. C, Cerebellum of a human fetus 17 cm long. D, Median section through cerebellum of sheep embryo 5 cm long.E, Median section through cerebellum of human fetus 17 cm long. Labels: 1, sulcus primarius; 2, sulcus above and afterwards behind the pyramid; 3, sulcus between pyramid and uvula; 4, great horizontal fissure; r.l., lateral recess ventricle IV; T, transverse groove in roof of ventricle IV.

Development of Cerebellum

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum…

An illustration of Biscayne Bay, is a lagoon that is approximately 35 miles (56 km) long and up to 8 miles (13 km) wide located on the Atlantic coast of south Florida. It is usually divided for purposes of discussion and analysis into three parts, North Bay, Central Bay and South Bay. North Bay separates Miami Beach on its barrier island from Miami on the mainland. It has been severely affected over the last century by raw sewage releases, urban runoff, shoreline bulkheading, dredging, the creation of artificial islands and the loss of natural fresh water flow into the bay. North Bay accounts for only 10% of the water area of the bay. Central Bay is the largest part of the bay. It is separated from the Atlantic Ocean by the Safety Valve, a series of shallow flats separated by tidal flow channels, stretching from the south end of Key Biscayne to the Ragged Keys at the north end of the Florida Keys. It has been adversely affected primarily by bulkheading, urban runoff discharged by canals, and the loss of natural fresh water flow. South Bay is nearly as large as Central Bay, and is the least affected by human activities, although it also suffers from the loss of natural fresh water flow. South Bay is separated from the Atlantic Ocean by the northernmost of the Florida Keys, and is connected to Florida Bay through channels and "sounds" lying between the mainland and the keys.

Biscayne Bay

An illustration of Biscayne Bay, is a lagoon that is approximately 35 miles (56 km) long and up to 8…

The Shedu is a celestial being from Mesopotamian mythology. He is a human above the waist and a bull below the waist. He also has the horns and the ears of a bull. The bull man helps people fight evil and chaos. He holds the gates of dawn open for the sun god Shamash and supports the sun disc. He is often shown on Cylinder Seals. It appears frequently in Mesopotamian art, sometimes with wings. Statues of the bull-man were often used as gatekeepers.

Shedu

The Shedu is a celestial being from Mesopotamian mythology. He is a human above the waist and a bull…

An illustration of a Norse Galley. Norse is an adjective relating things to Norway, Denmark, Faroe Islands, Greenland, Iceland and Sweden. A galley is an ancient ship which can be propelled entirely by human oarsmen, used for warfare and trade. Oars are known from at least the time of the Egyptian Old Kingdom. Many galleys had masts and sails for use when the winds were favorable.

Norse Galley

An illustration of a Norse Galley. Norse is an adjective relating things to Norway, Denmark, Faroe Islands,…

Olfactory and supporting cells in a frog and a human. A. Frog. B. Human. C. Human.

Olfactory and Supporting Cells

Olfactory and supporting cells in a frog and a human. A. Frog. B. Human. C. Human.

Diagrammatic section of the human retina.

Section of Retina

Diagrammatic section of the human retina.

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated into discs.

Cones and Rods of Retina

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated…

Pigment epithelium of human retina (viewed from the surface).

Pigment Epithelium of Retina

Pigment epithelium of human retina (viewed from the surface).

Transverse section of human semicircular canal.

Section of Semicircular Canals

Transverse section of human semicircular canal.

A, Left labyrinth of a human embryo of about four weeks; B, left labyrinth of a human embryo of about 5 weeks.

Development of Labyrinth

A, Left labyrinth of a human embryo of about four weeks; B, left labyrinth of a human embryo of about…

A, Section through papilla vallata of a human tongue. B, Section through part of the papilla foliata of a rabbit. Labels: 1, papilla; 2, vallum; 3, taste buds; 4, papillae; 5, taste buds; 6, ducts of serous gland.

Tongue of Human and Rabbit

A, Section through papilla vallata of a human tongue. B, Section through part of the papilla foliata…

An illustration of a male (right) and female (left) cockroach. Cockroaches (or simply "roaches") are insects of the order Blattaria. This name derives from the Latin word for "cockroach", blatta. There are about 4,000 species of cockroach of which 30 species are associated with human habitations and about four species are well known as pests.

Cockroach

An illustration of a male (right) and female (left) cockroach. Cockroaches (or simply "roaches") are…

Watercresses are fast-growing, aquatic or semi-aquatic, perennial plants native from Europe to central Asia, and one of the oldest known leaf vegetables consumed by human beings. These plants are members of the Family Brassicaceae or cabbage family, botanically related to garden cress and mustard — all noteworthy for a peppery, tangy flavor.

Watercress

Watercresses are fast-growing, aquatic or semi-aquatic, perennial plants native from Europe to central…

The American Harpy Eagle (Harpia harpyja) is a neotropical eagle, often simply called the Harpy Eagle. It is the only member of the genus Harpia. It is the largest and most powerful raptor found in the Americas, usually inhabiting tropical lowland rainforests in the upper (emergent) canopy layer. Its name references the harpies from Ancient Greek mythology. These were wind spirits that took the dead to Hades, and were said to have a body like an eagle and the face of a human.

American Harpy Eagle

The American Harpy Eagle (Harpia harpyja) is a neotropical eagle, often simply called the Harpy Eagle.…

A Sphinx is a zoomorphic mythological figure which is depicted as a recumbent lion with a human head.

Sphinx

A Sphinx is a zoomorphic mythological figure which is depicted as a recumbent lion with a human head.

An illustration of a fossil containing Chirotherium tracks. Chirotherium (also known as Cheirotherium) or 'hand-beast', is the name of a creature which may be known only from fossil imprints of its tracks (trace fossils). These look, by coincidence, remarkably like the hand of an ape/human or bear, with the outermost toe having evolved to extend out to the side like a thumb, although probably only providing a firmer grip in mud. Its tracks were first found in 1834, in red sandstone in Thuringia, Germany, dating from 240 million years ago (mya). This creature was probably an archosaur, related to the ancestors of the dinosaurs.

Chirotherium Tracks

An illustration of a fossil containing Chirotherium tracks. Chirotherium (also known as Cheirotherium)…

The sedan or litter is a wheelless, human-powered vehicle used to carry one person sitting inside.

Sedan

The sedan or litter is a wheelless, human-powered vehicle used to carry one person sitting inside.

A pixy named Thomas alarmed that a human has just invaded his lawn by jumping over Thomas' wall.

Pixy and a Man

A pixy named Thomas alarmed that a human has just invaded his lawn by jumping over Thomas' wall.

An illustration of: 1, Coralla cut open showing the four stamens; 2, Unripe fruit (lengthwise); 3, ripe capsule split open; and the foxglove plant. Digitalis is a genus of about 20 species of herbaceous perennials, shrubs, and biennials that are commonly called foxgloves. The genus was traditionally placed in the figwort family Scrophulariaceae, but upon review of phylogenetic research, it has now been placed in the much enlarged family Plantaginaceae. The genus is native to Europe, western and central Asia, and northwestern Africa. The scientific name means "finger-like" and refers to the ease with which a flower of Digitalis purpurea can be fitted over a human fingertip. The flowers are produced on a tall spike, are tubular, and vary in colour with species, from purple to pink, white, and yellow. The best-known species is the Common Foxglove, Digitalis purpurea. It is a biennial, often grown as an ornamental plant due to its showy flowers, that range in colour from purples through to whites, with variable marks and spotting. The first year of growth produces only the long, basal leaves. In the second year, the erect leafy stem 0.5-2.5 m tall develops.

Foxglove

An illustration of: 1, Coralla cut open showing the four stamens; 2, Unripe fruit (lengthwise); 3, ripe…

Corystes cassivelaunus, the masked crab, helmet crab or sand crab, is a burrowing crab of the North Atlantic and North Sea from Portugal to Norway, which also occurs in the Mediterranean Sea. It may grow up to 4 cm long (carapace length). The name "masked crab" derives from the patterns on the carapace which resemble a human face, in a similar manner to heikegani.

Masked Crab

Corystes cassivelaunus, the masked crab, helmet crab or sand crab, is a burrowing crab of the North…

In 1959 an international donations campaign to save the monuments of Nubia began: the southernmost relics of this ancient human civilization were under threat from the rising waters of the Nile that were about to result from the construction of the Aswan High Dam. This image gives a perspective view of the entrance hall, in which are seen eight standing colossal statues 33 feet high, supported by square piers.1

Entrance to the Great Temple at Abu Simbel

In 1959 an international donations campaign to save the monuments of Nubia began: the southernmost relics…

The Sumerian word lama, which is rendered in Akkadian as lamassu, refers to a beneficient protective female deity. The corresponding male deity was called alad, in Akkadian, šêdu. In art they were depicted as hybrids, as winged bulls or lions with the head of a human male (Centauroid). There are still surviving figures of šêdu in bas-relief and some statues in museums. Notable examples of šêdu/lamassu held by museums include those at the British Museum, Musée du Louvre, National Museum of Iraq, Metropolitan Museum of Art and one extremely large example kept at the Oriental Institute, Chicago. They are generally attributed to the ancient Assyrians.

Winged Bull from Nimrud

The Sumerian word lama, which is rendered in Akkadian as lamassu, refers to a beneficient protective…

The human thoracic viscera.

Thoracic Viscera

The human thoracic viscera.

Cavities of the right side of the heart.

Heart Cavities

Cavities of the right side of the heart.

Caryatides are a blending of architecture and sculpture, but they are not of frequent occurrence. These Caryatides are human figures which serve as supports instead of a column, and a similar purpose is answered by male figures, which are technically called Atlantes.

Caryatis from the Erechtheum at Athens

Caryatides are a blending of architecture and sculpture, but they are not of frequent occurrence. These…

Caryatides are a blending of architecture and sculpture, but they are not of frequent occurrence. These Caryatides are human figures which serve as supports instead of a column, and a similar purpose is answered by male figures, which are technically called Atlantes.

Profile of the Caryatis with Pedestal and Entablature

Caryatides are a blending of architecture and sculpture, but they are not of frequent occurrence. These…

The Bacchus Mask (Greek God of wine) is a Graeco Italic style. It is a fragment of a vessel or utensil.

Bacchus Mask

The Bacchus Mask (Greek God of wine) is a Graeco Italic style. It is a fragment of a vessel or utensil.

The Dying Warrior Mask was designed by Schluter for the Berlin arsenal in 1697.

Dying Warrior Mask

The Dying Warrior Mask was designed by Schluter for the Berlin arsenal in 1697.