5 razones por las cuales es importante para tu vida conoser del nucleo y sus estructuras

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.

c. is the correct answer

it is called the mitotic spindle