They provide energy to the body kind of like gas to a car
National parks reduce the human impact on land by preventing human development.
Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. The pulmonary vein empties oxygen-rich blood, from the lungs into the left atrium.
Explanation:
hope this helps...
and if u didn't get it its veins...
C because it might not protect your fall
Menopause happens because of a DECREASE in the ovaries' production OF the hormones ESTROGEN and progesterone.
