Question

what do you mean by endocytosis

Answer 1

Endocytosis is a form of bulk transport in which a cell transports molecules (such as proteins) into the cell (endo- + cytosis) by engulfing them in an energy-using process. Endocytosis and its counterpart, exocytosis, are used by all cells because most chemical substances important to them are large polar molecules that cannot pass through the hydrophobic plasma or cell membrane by passive means.

Answer 2

in the bulk of transfer of material inside and outside of the body with the help of plasma membrane...