Question

1. read to me on each side of the heart, blood flows from the veins into the superior chamber, called the _. worth 1.000 points. a. atrium b. ventricle c. septum 8. read to me the ventricles have thick, muscular walls. worth 1.000 points. a. true b. false 9. read to me veins always carry blood _ the heart. worth 1.000 points.

Explanation:

Question 7

The heart has four chambers: two atria (superior chambers) and two ventricles (inferior chambers). Blood from veins enters the atria first. The septum is the wall dividing the heart, not a chamber. So the superior chamber blood flows into from veins is the atrium.

Ventricles need to pump blood out of the heart (to the lungs or the rest of the body), so they have thick, muscular walls to generate enough force for this pumping action. Atria have thinner walls as they only need to pump blood into the ventricles. Thus, the statement is true.

By definition, veins are blood vessels that transport blood back to the heart (except pulmonary veins which carry oxygenated blood to the heart, but still towards the heart). Arteries carry blood away from the heart (except pulmonary artery carrying deoxygenated blood away from the heart to lungs). So veins carry blood towards the heart.

Answer:

A. atrium

Question 8