Question

defination of human organ system​

Answer 1

Answer:

Organ System Definition. An organ system is a group of organs that work together to perform a certain function in an organism's body. ... An example of an organ system is the circulatory system, which includes the heart, arteries, veins, and capillaries. The human body has 11 different organ systems.

Explanation:

Answer 2

In unicellular organisms, all the functions are performed by a single cell. Whereas in complex organism they are mostly multi cellular and various Functions are done by various kinds of cells.

In the human body, there are billions of cells that perform various functions in the body. Such an organisation of complex system is very effective for the better coordination of various cell activities in the organism.