What is the difference between an artery and a vein? 1 An artery carries blood away from the heart; a vein carries blood to the heart.
2 An artery is responsible for carrying blood; a vein is responsible for gas exchange.
3 An artery is responsible for gas exchange; a vein is responsible for carrying blood.
4 An artery carries blood to the heart; a vein carries blood away from the heart.

1 An artery carries blood away from the heart,a vein Carrie's blood to the heart

1. An artery carries blood away from the heart; a vein carries blood to the heart.

Explanation:

An artery carries away oxygen-rich blood from the heart to other body parts, whereas a vein takes blood low in oxygen back to the heart for oxidation.

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.

the answer would be..

b. sucking