This human anatomy ClipArt gallery offers 825 illustrations of the human skeletal system, including images of both the axial skeleton and the appendicular skeleton. The human axial skeleton includes 80 bones formed by the vertebral column (spine), the thoracic cage (e.g., ribs, sternum), and the skull. The axial skeleton is responsible for the upright position of the body. The human appendicular skeleton is composed of 126 bones formed by the pectoral girdles, the upper and lower limbs, and the pelvic girdle. These bones function in locomotion as well as protection of vital organs.

Bones of the Ankle and Foot. Labels: m, metatarsal bones; p, phalanges; ca, os calcis, or heel bone.

Bones of the Ankle and Foot

Bones of the Ankle and Foot. Labels: m, metatarsal bones; p, phalanges; ca, os calcis, or heel bone.

Posterior aspect of inferior tibio fibular and ankle joint.

Ankle Joint

Posterior aspect of inferior tibio fibular and ankle joint.

Vertical section of the ankle joint and foot. Labels: 1, tibia; 2, astragalus; 3, os calci; 4, scaphoides; 5, cuneiforme internum; 6, metatarsal bone of the great toe; 7, first phalanx of the great toe; 8, second phalanx of the great toe; 9, articular cavity between the tibia and astragalus; 10, synovial capsule between astragalas and calcis; 11, calcaneo-astragaloid interosseous ligament; 12, synovial capsule between astragalas and scaphoides; 13, calcaneo-scaphoid ligament; 14, calcaneo-cuboid ligament; 15, synovial capsule between scaphoides and cuneiforme internum; 16, synovial capsule between cuneiforme internum and first metatarsal bone; 17, metatarso-phalangeal articulation of the great toe, with sesamoid bones below; 18, phalangeal articulation of the great toe.

Ankle Joint and Foot

Vertical section of the ankle joint and foot. Labels: 1, tibia; 2, astragalus; 3, os calci; 4, scaphoides;…

Coronal section through the ankle joint and the calcaneo-astragaloid articulation.

Coronal Section Through the Ankle Joint

Coronal section through the ankle joint and the calcaneo-astragaloid articulation.

External view of the ankle joint.

External View of the Ankle Joint

External view of the ankle joint.

Internal view of the ankle joint.

Internal View of the Ankle Joint

Internal view of the ankle joint.

Coronal section through the left ankle joint, astragalus, and calcaneum.

Section Through Ankle Joint

Coronal section through the left ankle joint, astragalus, and calcaneum.

Socket of right ankle joint from below.

Socket of Ankle Joint

Socket of right ankle joint from below.

The ligaments and hinged joint of the ankle.

Ligaments and Hinge Joint of the Ankle

The ligaments and hinged joint of the ankle.

An internal view of the ankle-joint: tarsal and tarsometatarsal articulations.

Ankle-joint

An internal view of the ankle-joint: tarsal and tarsometatarsal articulations.

Bones of the arm and hand. Labels: a, large end of ulna; b, radius; c, small end of the ulna; d, carpal bones; e, metacarpal bones; f, first row of the bones of the fingers.

Bones of the Arm and Hand

Bones of the arm and hand. Labels: a, large end of ulna; b, radius; c, small end of the ulna; d, carpal…

The skeleton of the arm and leg. Labels: H, the humerus; Cd, its articular head which fits into the glenoid fossa of the scapula; U, the ulna; R, the radius; O, the olecranon; Fe, the femur; P, the patella; Fi, the fibula; T, the tibia.

Arm and Leg Skeleton

The skeleton of the arm and leg. Labels: H, the humerus; Cd, its articular head which fits into the…

"The bones of the arm. a, humerus; b, ulna; c, radius; d, the carpus; e, the fifth metacarpal; f, the three phalanges of the fifth digit (little finger)." —Martin, 1917

Arm Bones

"The bones of the arm. a, humerus; b, ulna; c, radius; d, the carpus; e, the fifth metacarpal; f, the…

Demonstration of the movement of a pivot joint. Labels: A, arm in supination (palm uppermost); B, arm in pronation (back of hand upward). H, humerus; R, radius; U, ulna.

Arm Bones

Demonstration of the movement of a pivot joint. Labels: A, arm in supination (palm uppermost); B, arm…

Section through right elbow joint.

Cross Section of Arm Through Elbow Joint

Section through right elbow joint.

Section through the epicondyles of the right humerus.

Cross Section of Arm Through Epicondyles

Section through the epicondyles of the right humerus.

Bones of the arm. Labels: A, arm in supination; B, arm in pronation. H, humerus; R, radius; U, ulna.

Bones of the Arm

Bones of the arm. Labels: A, arm in supination; B, arm in pronation. H, humerus; R, radius; U, ulna.

The muscles on the back of the arm, forearm and hand.

Muscles on the Back of the Arm, Forearm and Hand

The muscles on the back of the arm, forearm and hand.

The left astragalus. A. Superior external view. B. Inferior internal view.

Astragalus

The left astragalus. A. Superior external view. B. Inferior internal view.

The right astragalus. A, Upper surface. B, Under surface. Labels: 1, groove for flex, long, hallucis; 2, internal tubercle; 3, trochlear surface for tibia; 4, body; 5, for articulation with internal malleolus; 6, head; 7, for articulation with internal malleolus; 8, neck; 9, for articulation with external malleolus; 10, surface against which the inferior tibio fibular ligament rests; 11, external tubercle; 12, external tubercle; 13, posterior, middle, and anterior facets for os calcis; 14, for articulation with navicular; 15, surface resting on inferior calcaneo-navicular ligament; 16, interosseous groove; 17, internal tubercle; 18, groove for the flexor longus hallucis.

Astragalus

The right astragalus. A, Upper surface. B, Under surface. Labels: 1, groove for flex, long, hallucis;…

The right astragalus. A, As seen from the outer side. B, As seen from the inner side. Labels: 1, external tubercle; 2, groove for flexor longus hallucis; 3, internal tubercle; 4, surface against which the inferior tibio-fibular ligament rests; 5, trochlea for tibia; 6, for articulation with external malleolus; 7, neck; 8, head; 9, for articulation with navicular; 10, interosseous groove; 11, anterior, middle, and posterior facets for os calcis; 12, body; 13, surface resting on internal calcaneo navicular ligament; 14, for articulation with navicular; 15, head; 16, neck; 17, trochlea for tibia; 18, for articulation with internal malleolus; 19, body; 20, impression for internal lateral ligament; 21, internal tubercle; 22, groove for flexor longus hallucis; 23, external tubercle; 24, interosseous groove; 25, posterior and middle facets for os calis.

Astragalus

The right astragalus. A, As seen from the outer side. B, As seen from the inner side. Labels: 1, external…

Right astragalus from above.

Astragalus from Above

Right astragalus from above.

Right astragalus from below.

Astragalus from Below

Right astragalus from below.

"View from above of the Atlas, the first cervical vertebra."—Finley, 1917

Atlas

"View from above of the Atlas, the first cervical vertebra."—Finley, 1917

The atlas, viewed from above.

Atlas

The atlas, viewed from above.

First cervical vertebra, or atlas.

Atlas

First cervical vertebra, or atlas.

The atlas, which is the first cervical vertebra. Labels: Aa, body of atlas, D, odontoid process of axis; Fas, facet on upper side of atlas with which the skull articulates; L, transverse ligament; Frt, vertebral foramen.

The Atlas (1st Cervical Vertebra)

The atlas, which is the first cervical vertebra. Labels: Aa, body of atlas, D, odontoid process of axis;…

The axis, which is the second cervical vertebra. Labels: D, odontoid process of axis; Fas, facet on upper side of atlas with which the skull articulates; Frt, vertebral foramen.

The Axis (2nd Cervical Vertebra)

The axis, which is the second cervical vertebra. Labels: D, odontoid process of axis; Fas, facet on…

The atlas from above.

Atlas from Above

The atlas from above.

The atlas from above. Labels: 1, posterior arch; 2, transverse process; 3, tubercle for transverse ligament; 4, anterior arch; 5, anterior tubercle; 6, surface for articulation with odontoid process; 7, superior articular process; 8, foramen for vertebral artery; 9, groove for vertebral artery; 10, posterior tubercle.

Atlas from Above

The atlas from above. Labels: 1, posterior arch; 2, transverse process; 3, tubercle for transverse ligament;…

The atlas from below.

Atlas from Below

The atlas from below.

The atlas vertebra (the first vertebra at the top of the spine which carries the head).

The Atlas Vertebra

The atlas vertebra (the first vertebra at the top of the spine which carries the head).

Unique case of absence of the anterior arch of the atlas.

Atlas Without Anterior Arch

Unique case of absence of the anterior arch of the atlas.

Diagrammatic representation of a segment of the axial skeleton V, a vertebra; C, Cv, ribs articulating above with the body and transverse process of the vertebra; S, the breastbone. The lighter-shaded part between S and C is the costal cartilage.

Segment of the Axial Skeleton

Diagrammatic representation of a segment of the axial skeleton V, a vertebra; C, Cv, ribs articulating…

"Side view of the axis, the second cervical vertebra."—Finley, 1917

Axis

"Side view of the axis, the second cervical vertebra."—Finley, 1917

Second cervical vertebra, or axis.

Axis

Second cervical vertebra, or axis.

The axis from behind and above.

Axis from Above

The axis from behind and above.

The axis from left side.

Axis from Side

The axis from left side.

The axis from the side.

Axis from the Side

The axis from the side.

The anterior articular surface of the axis vertebra.

The Axis Vertebra

The anterior articular surface of the axis vertebra.

The axis from in front.

Front View of Axis

The axis from in front.

The bone of the middle line of the back.

Backbone

The bone of the middle line of the back.

Bone corpuscles with their processes as seen in a thin section of human bone.

Bone Corpuscles

Bone corpuscles with their processes as seen in a thin section of human bone.

This figure shows a thigh bone that has been softened by exposing it to acid, then twisted in a knot to demonstrate it's flexibility. Bones are composed of a "mineral" or hard substance and an "animal" or soft substance. The animal component can be removed by exposing the bone to extreme heat, causing the bone to become brittle and break easily. Similarly, the mineral component can be removed by exposing the bone to acid. Once the brittle mineral part is removed by the acid, the bone is soft and flexible.

Bone Exposed to Acid and Twisted

This figure shows a thigh bone that has been softened by exposing it to acid, then twisted in a knot…

Examples of bone fractures.

Bone Fractures

Examples of bone fractures.

Section of bone marrow. Labels: f, fat vacuole; e, eosinophile cells; ,y, myeloplaxes; r, red corpuscles; m, marrow cells; h, haematoblasts or erythroblasts.

Section of Bone Marrow

Section of bone marrow. Labels: f, fat vacuole; e, eosinophile cells; ,y, myeloplaxes; r, red corpuscles;…

Schematic diagram, showing epiphysis and diaphysis and line of ossification. Labels: Ep, epiphysis of endochondral bone; zpt, zone of proliferation; zc, zone of calcification; ca, cartilage.

Bone Ossification

Schematic diagram, showing epiphysis and diaphysis and line of ossification. Labels: Ep, epiphysis of…

Longitudinal section of bone, a microscopic view. 1: Cells; 2: Canals; 3: Intercellular substance.

Bone Section

Longitudinal section of bone, a microscopic view. 1: Cells; 2: Canals; 3: Intercellular substance.

Cross-section of bone, a microscopic view. 1: Cells; 2: Canals; 3: Intercellular substance.

Bone Section

Cross-section of bone, a microscopic view. 1: Cells; 2: Canals; 3: Intercellular substance.

If we divide any of the long bones longitudinally, we find two kinds of structure, the hard or compact, and the alveolar or spongy. Indeed there is no bone that does not exhibit to some extend both of these structures; the compact forming its external, and the spongy its internal part. These two formations are clearly seen in the bones which compose the skull, as in the following cut, with the spongy or cancellated structure between them. This serves to illustrate the structure of all of the flat bones.

Bone Structure

If we divide any of the long bones longitudinally, we find two kinds of structure, the hard or compact,…

Bone structure. Labels: a, the external, b,c, the internal table; the intermediate cellular texture, being soft and spongy, and conveying vessels and nerves from one part to another.

Bone Structure

Bone structure. Labels: a, the external, b,c, the internal table; the intermediate cellular texture,…

A diagram of the relative position of the bone, cartilage, and synovial membrane. Labels: 1,The extremities of two bones to form a joint. 2, The cartilage that covers the end of the bone. 3, The synovial membrane, which covers the cartilage of both bones and is then doubled back from one to the other, represented by the dotted lines.

Position of the Bone, Cartilage, and Synovial Membranes

A diagram of the relative position of the bone, cartilage, and synovial membrane. Labels: 1,The extremities…

Earthy portion of bone, resulting from exposure to a strong heat. The resulting bone is very brittle, as the animal matter has been wholly consumed by the heat or fire, while the earthy part remains unchanged.

Earthy Portion of Bone

Earthy portion of bone, resulting from exposure to a strong heat. The resulting bone is very brittle,…

Longitudinal section of compact bone, ground and dried.

Longitudinal Section of Compact Bone

Longitudinal section of compact bone, ground and dried.

A thin slice of bone, highly magnified, showing the lacunae, the tiny tubs (canaliculi) radiating from them, and four Huversian canals, three seen crosswise and one lengthwise.

A Magnified View of a Bone

A thin slice of bone, highly magnified, showing the lacunae, the tiny tubs (canaliculi) radiating from…

Membranous, or gelatinous portion of bone; the earthy portion being so completely removed (by immersion in nitric acid), that it is capable of being tied in a knot.

Membranous Portion of Bone

Membranous, or gelatinous portion of bone; the earthy portion being so completely removed (by immersion…

The bone contains a multitude of small irregular spaces, approximately fusiform in shape, called lacunae, with very minute canals leading from them and anastomosing with similar little prolongations from the other lacunae. Shown is a transverse section of compact bony tissue of a humerus. Three of the Haversian canals are seen, with their concentric rings; also the lacunae, with the canaliculi were filled with debris in grinding down the section, and therefore appear black in the figure, which represents the object as viewed with transmitted light. The Haversian systems are so closely packed in this section that scarcely any interstitial lamellae are visible.

Bone, Microscopic Structure of

The bone contains a multitude of small irregular spaces, approximately fusiform in shape, called lacunae,…

The bone contains a multitude of small irregular spaces, approximately fusiform in shape, called lacunae, with very minute canals leading from them and anastomosing with similar little prolongations from the other lacunae. Shown is a longitudinal section from the human ulna, showing Haversian canal, lacunae, and canaliculi.

Microscopic Structure of Bone

The bone contains a multitude of small irregular spaces, approximately fusiform in shape, called lacunae,…

A small piece of bone, ground very thin and highly magnified. "If a bit of bone is still more magnified we find that very small cavities called lacunae lie between the lamelae; from each lacuna radiate many extremely fine tubes, the canaliculi, so that it looks like a small animal with a great many legs. The innermost canaliculi open into the Haversian canal of the system to which they belong, and those of various lacunae communicate with one another, so that a set of passages is provided through which liquid which transudes from the blood vessel in the Haversian canal can ooze through the bone." —Newell, 1900.

Section of Bone

A small piece of bone, ground very thin and highly magnified. "If a bit of bone is still more magnified…

Transverse section of compact bone (metatarsal); the section has been ground and dried, hence the lacunae are filled with air.

Transverse Section of Compact Bone

Transverse section of compact bone (metatarsal); the section has been ground and dried, hence the lacunae…