5. Besides being part of the composition of bone, why else do mammals need calcium?

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

How are fossils most commonly formed