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Amoeba are one-celled organisms of the Kingdom Protista

Amoeba

Amoeba are one-celled organisms of the Kingdom Protista

"Diagram showing an amoeba in successive stages of division." — Blaisedell, 1904

Amoeba

"Diagram showing an amoeba in successive stages of division." — Blaisedell, 1904

The streaming of Protoplasm in the Amoeba. The forward motion of the granules takes place more rapidly in the centre of the pseudopodium (p). Those at the margin fall behind those in the centre as the pseudopodium advances.

Amoeba

The streaming of Protoplasm in the Amoeba. The forward motion of the granules takes place more rapidly…

An illustration of an amoeba: n, nucleus.

Amoeba

An illustration of an amoeba: n, nucleus.

An illustration of an amoeba: n, nucleus.

Amoeba

An illustration of an amoeba: n, nucleus.

An illustration of an amoeba: n, nucleus.

Amoeba

An illustration of an amoeba: n, nucleus.

An illustration of an amoeba: n, nucleus; cv, contractile vacuole.

Amoeba

An illustration of an amoeba: n, nucleus; cv, contractile vacuole.

Amoung the simplest one-celled animals living in the ooze at the bottom of nearly every freshwater stream or pond is the Amoeba, whose body is barely visible to the unaided eye. Here we see the amoeba, highly magnified, showing(c.v.) pulsating vacuole; (f) food particle; (n) nucleus. (7B) The shape of the same individual 30 seconds later.

Amoeba

Amoung the simplest one-celled animals living in the ooze at the bottom of nearly every freshwater stream…

Difflugia one of several genera of amoebozoa that produce shells or tests from granules of sand. These are swallowed by the cell and during the process of budding or fission they pass into the daughter, where they are joined by organic cement. The test has a single terminal opening. Difflugia are particularly common in marshes. The Difflugia use pseudopods to move around. It is a heterotroph and it engulfs its food.

Amoeba

Difflugia one of several genera of amoebozoa that produce shells or tests from granules of sand. These…

The amoeba in the process of division

Amoeba

The amoeba in the process of division

Gromia is a widespread genus of marine and freshwater amoeboids, closely resembling some foraminiferans.

Amoeba

Gromia is a widespread genus of marine and freshwater amoeboids, closely resembling some foraminiferans.

"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical sections of the helicoid forms." -Whitney, 1911

Diagrams of Foraminifera

"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical…

"Gregarina, their free amoebiform contents. GREGARINIDAE. A family or other major group of endoplastic protozoans, having spheroidal, ovoid, or elongated bodies, sometimes with a segmental constriction, and occasionally one end of the body beaked with an epimerite bearing curved horny spines." -Whitney, 1911

Amoebiform Gregarina

"Gregarina, their free amoebiform contents. GREGARINIDAE. A family or other major group of endoplastic…

An illustration of the adult amoeboid Lymphosporidium truttae, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium

An illustration of the adult amoeboid Lymphosporidium truttae, which was the cause of the brook-trout…

An illustration of Lymphosporidium truttae in the blood cell of a brook trout, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium in Blood Cell

An illustration of Lymphosporidium truttae in the blood cell of a brook trout, which was the cause of…

An illustration of Lymphosporidium truttae in the blood cell of a brook trout with numerous sporoblasts, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium in Blood Cell

An illustration of Lymphosporidium truttae in the blood cell of a brook trout with numerous sporoblasts,…

In this image, (a) represents the parasites in the various stages of development, and (b), the larger animalcule on which they have established themselves.

Paramecium Aurelia and its Parasites

In this image, (a) represents the parasites in the various stages of development, and (b), the larger…

"The singular phenomenon of spontaneous division may be witnessed by any one having patience to examine the creature long enough under the microscope, isolated from its innumerable companions. This process is represented here, A and B being the adult, C the same in course of separation, D after its completion."

Propagation of an Infusorian by Spontaneous Division

"The singular phenomenon of spontaneous division may be witnessed by any one having patience to examine…

"Spherical cell (resting stage of Amoeba) illustrating general or universal symmetry. Any plane passing through the center will divide it into two essentially equal portions." — Galloway

Spherical Cell

"Spherical cell (resting stage of Amoeba) illustrating general or universal symmetry. Any plane passing…

"The common Volvox is found in great abundance during the summer, and even in the depth of winter in lakes and ponds of fresh water."

Volvox Globular

"The common Volvox is found in great abundance during the summer, and even in the depth of winter in…

"The common Volvox is found in great abundance during the summer, and even in the depth of winter in lakes and ponds of fresh water."

Volvox Globular

"The common Volvox is found in great abundance during the summer, and even in the depth of winter in…

The vorticella is an interesting protozoan. It is found on submerged stems and leaves in stagnant water, sometimes appearing like a delicate white fringe.

Vorticella

The vorticella is an interesting protozoan. It is found on submerged stems and leaves in stagnant water,…