What supports and protects the chest cavity?

A bony cage (commonly called the rib cage), which is formed by the sternum, ribs, and spine, protects the lungs and other organs in the chest. The 12 pairs of ribs curve around the chest from the back. Each pair is joined to the bones (vertebrae) of the spine.

Explanation:

The bones of the chest — namely the rib cage and spine — protect vital organs from injury, and also provide structural support for the body.

Explanation:

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%