Avitamin is a a) protein that acts as a catalyst for cell functions b) substance that is soluble in water and is stored in the body c) compound that organisms need in small amounts but cannot produce

Hi !!

A vitamin is a compound that organisms need in small amounts but cannot produce

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.