Answer:
the respiratory and circulatory systems work together to provide the body with oxygen and to rid the body of carbon dioxide.
The group of organs that work together to perform a specific function is called an organ system.
When a group of tissues work together to perform a particular role in the human body, they make up an organ. Examples of organs include the heart, liver, lungs, and gall bladder. A minimum of two tissues is required to form an organ.
TISSUE is a group of cells that have similar structure and that function together as a unit. Primary types of body tissues include epithelial, connective, muscular, and nervous tissues.
A CELL is the smallest unit of a living thing. A living thing, whether made of one cell (like bacteria) or many cells (like a human), is called an organism. Thus, cells are the basic building blocks of all organisms.
Explanation:
Correct me if I'm wrong ^_^
