How do amoeba circulate food and oxygen?

Answer 1

NUTRITION IN AMOEBA

Amoeba nutrition involves five steps :

1. INGESTION

Ingestion involves taking in of food.

Amoeba do not have mouth, therefore food intake may take place from any part of the body, but it usually takes place at the advancing end i.e., pseudopodia. This process of obtaining food is called phagocytosis.

2. DIGESTION

Digestion is the breakdown of complex food molecules into simpler molecules through a series of chemical reactions carried out by various enzymes.

In Amoeba, the food digestion occurs within the food vacuoles which, thus, act as temporary stomach. Digestive enzymes secreted by the cytoplasm are stored in the cytosomes. A lysosome full of enzymes fuses with each food vacuole and converts it into diffusible form. Enzymes reported for amoeba include : amylase, which converts starches to sugars, protease, which breaks proteins to amino acids, lipase, that changes fats to fatty acids and glycerol.

3. ABSORPTION

Absorption means taking up digested nutrient molecules into the cells of living organisms.

In Amoeba, the soluble foods resulting from digestion diffuse through the food vacuoles into the surrounding cytoplasm. As absorption proceeds, the food vacuoles decrease in size till only the indigestible matter is left in them.

4. ASSIMILATION

The absorbed food is synthesised into protoplasm and this is known as assimilation. Some food is synthesised into storage products like glycogen and fats. Synthesis is aided by enzymes.

5. EGESTION

The removal of the undigested food is known as egestion.

In Amoeba, egestion may occur in any part of the body. The indigestible matter left in the food vacuoles is denser than the surrounding endoplasm. Such vacuoles finally come in contact with the plasmalemma. The plasmalemma ruptures at this point, and the indigested food is thrown out. Plasmalemma soon gets repaired to prevent the outflow of the endoplasm.

Answer 2

Amoeba and many other creatures of the sort release their waste through the contractile vacuole . Amoeba have little feet, called pseudopod. When they eats, They engulf the food. It is then digested in the food vacuole, and released through the contractile vacuole.

Answer 3

In an amoeba, nutrients and waste are moved throughout by simple diffusion. Because they are so small, diffusion works for them when it is not possible for larger organisms like us.

Answer 4

food - cytoplasm

oxygen- the membrane

Answer 5

The cell's organelles and cytoplasm are enclosed by a cell membrane, obtaining its food through phagocytosis (engulfing).

Answer 6

diffusion? Im pretty sure