Amoeba ordinary appearance is a cell is directly related to the type of protozoa, a class rhizopods, or else they are called sarkodovyh.They have false foot, is the body through which they move and capture food.Thick shell in cells missing in connection with which the amoeba can easily change shape.The outer cover - very thin cytoplasmic membrane.
amoeba common structure.
amoeba very simple arranged.One of the simplest living beings.It has no skeleton.Amoeba ordinary lives at the bottom of the various reservoirs in the mud.There is one thing: in fresh waters only: ponds, ditches, etc.If you look at it, it was obvious that the gray transparent lump has no constant shape.The name of this being translated as "volatile".At all times the cell body pseudopodia formation, due to the fact that the cytoplasm flows back and forth.Dimensions lump can be at least 0.2 millimeters and a maximum of 0.7 millimeters.Organelles - pseudopodia facilitate the movement of this tiny creature.The movement is very slow, it reminds the flow of thick mucus.During motion amoeba encounters various single-celled organisms such as algae and bacteria.It wraps around them and how to suck their own cytoplasm, forming a digestive vacuole.
amoeba common cytoplasm allocates specific enzymes that digest food.There is a process of intracellular digestion.Overcooked food in liquid form enter the cytoplasm itself and the undigested food residue - are released.This method of capture is called phagocytosis write.In the body there amoeba thin channels through which fluid flows to the cell body.This process is known as pinocytosis.Available one vacuole ejected in excess liquids out.It is called the contractile vacuole.Get rid of excess every five minutes.In endoplasma has a kernel.Reproduction occurs as follows: the cell divides in two, ie asexually.
as an amoeba is fenced off from the adverse effects from the outside.
If there are unfavorable conditions for the existence of this organism, such as a drying pond, cooling the water in the reservoir, and the rest is ordinary amoeba always seeks to dissociate itself from them.Retracts its organelles, covered double shell and thus forms a cyst.In the event of favorable conditions, such as summer leaves the amoeba cysts.The cyst is carried by the wind, so common amoeba is settled.Breathing this creature takes the entire surface of his body, that is, the cell body.Amoeba absorbs oxygen in the aqueous medium, releases carbon dioxide.With oxygen nutrients decompose into simpler compounds.In humans and many animals, in particular in their gut, live parasitic amoeba.One of the representatives of these parasites is dysentery amoeba.It feeds particles intestine (destroyed), and red blood cells.It is the causative agent of an infectious disease, which is called amoebic dysentery.
Conclusions:
- ordinary and amoeba dysentery amoeba are single-celled animals.Moves via organelles-prolegs belong to rhizopod;
- class rhizopods like algae, which indicates their relationship;
- fed organic substances got from other plants or from other protozoa, amoeba that distinguishes them from algae.
Amoeba - though simple, but a body that can lead an independent existence.
