What chambers of the heart receive blood from the body, ventricles or atria? ___________ What chambers of the heart pump blood o
ut of the heart, ventricles or atria? ___________ Which heart chamber has the thickest muscle wall? 20.Why is it necessary for the chamber in the above question to have a thicker muscle wall? ________________________________________________________ Which blood vessel brings oxygen poor blood to the heart from the rest of the body? ________________________________________________________ Which blood vessel takes blood from the heart and sends it to the lungs? Which blood vessel takes oxygen-rich blood from the lungs and brings it back to the heart? ________________________________________________________ Which blood vessel sends oxygen-rich blood from the heart to the rest of the body? ________________________________________________________ How do the valves control the flow of blood through the heart? ________________________________________________________________ Answer the Conclusion questions.
7.Four heart valves control the flow of blood through the heart. They act as one-way doors, opening to let blood exit or enter a chamber, then closing to keep blood from flowing backward.
