Growth factors and cytotoxic factors also regulate inflammatory response. These cytokines and other chemicals recruit immune cells to the site of infection and promote healing of damaged tissue following the removal of pathogens. NFkB plays a key role in regulating the immune response to infection.
Stomata facilitate the exchange of gases in the leaf. Carbon dioxide (CO 2 ) diffuses into the leaf through the stomata for use in photosynthesis, and oxygen (O 2 ), the waste product of photosynthesis, diffuses out of the leaf through stomata. Stomata are also crucial for water transport through the xylem .
Bones are the organs of the skeletal system. Functions of the skeletal system are: support - it forms the body's framework to support the muscles and organs. 1) forming the bony cavities around organs, e.g. the thoracic cavity protects the heart and lungs, the cranial cavity protects the brain.