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...
Make it sound fun.
Help them come up with ideas to do
set goals
add a prize at the end to make them strive for.
I believe it is A because i feel it is the only exercise were you are using your arms to lift you entire body off the ground, but who knows i could be wrong <span />
