What is Cytoproct in biology?
The anal pore or cytoproct is a structure in various single-celled eukaryotes where waste is ejected after the nutrients from food have been absorbed into the cytoplasm. They serve as analogues of, respectively, the anus and mouth of multicellular organisms.
What is Cytoproct paramecium?
The cytoproct, at rest, is a long narrow ridge along the posterior suture. It contains 2 uniquely positioned components which identify this structure as the cytoproct: piles of fibres along the inside surfaces of the ridge, and microtubules passing from the epiplasm at the summit of the ridge down into the cytoplasm.
What is the function of Cytopyge?
Cytopyge is a fixed point for waste discharge in the body of a protozoan, especially a ciliate.
Why are protozoans not categorized as animals?
Protozoa are not classified in the animal kingdom because they are unicellular organisms, which means they are made of only one cell.
What do you mean by Cytopyge?
Definition of cytopyge : the point especially if permanently identifiable at which waste is discharged from the protozoan body.
What is meant by Cytostome?
Medical Definition of cytostome : the mouth of a unicellular organism.
Why is protozoa called protozoa?
When first introduced by Georg Goldfuss (originally spelled Goldfuß) in 1818, the taxon Protozoa was erected as a class within the Animalia, with the word ‘protozoa’ meaning “first animals”. Some examples of protozoa are Amoeba, Paramecium, Euglena and Trypanosoma.
What is the function of Cytostome?
A cytostome (from cyto-, cell and stome-, mouth) or cell mouth is a part of a cell specialized for phagocytosis, usually in the form of a microtubule-supported funnel or groove. Food is directed into the cytostome, and sealed into vacuoles.
What is the function of Macronucleus?
The macronucleus is the centre of all metabolic activities of the organism. The micronucleus is a storage site for the germline genetic material of the organism. It gives rise to the macronucleus and is responsible for the genetic reorganization that occurs during conjugation (cross-fertilization).
What is macronucleus and micronucleus?
What is the cytoproct at rest?
The cytoproct, at rest, is a long narrow ridge along the posterior suture. It contains 2 uniquely positioned components which identify this structure as the cytoproct: piles of fibres along the inside surfaces of the ridge, and microtubules passing from the epiplasm at the summit of the ridge down into the cytoplasm.
What is the function of the cytoproct in Paramecium?
The cytoproct is used for the excretion of indigestible debris contained in the food vacuoles. In paramecium, the anal pore is a region of pellicle that is not covered by ridges and cilia, and the area has thin pellicles that allow the vacuoles to be merged into the cell surface to be emptied.
What is the function of the cytopyge and cytostome?
In ciliates, the anal pore (cytopyge) and cytostome are the only regions of the pellicle that are not covered by ridges, cilia or rigid covering. They serve as analogues of, respectively, anus and mouth of multicellular organisms. The thin membrane of the cytopyge allows vacuoles to be merged into the cell wall and emptied.
What happens when a food vacuole reaches the cytoproct region?
As a food vacuole approaches the cytoproct region it actually starts to flatten out the surrounding cells, a thin membrane vacuole allows it to be combined in the cell wall. Once the vacuole attaches to the plasma membrane of the cell wall the vacuole is emptied.