What Do Organs Do for the Body?

In an organ, different tissues work together to carry out a particular function. These are the main organs, as well as their primary function: The brain controls thoughts, memory and other organs. The heart pumps blood around the body.

What do organ systems do for the body?

Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.

What is the most important body organ?

Anatomy & Function

The brain is arguably the most important organ in the human body. It controls and coordinates actions and reactions, allows us to think and feel, and enables us to have memories and feelings—all the things that make us human.