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.
Pollution adds heat to the air. for example: gas and smoke from cars and trucks etc. climate change will be affected because the heat will cause the weather and atmosphere around to get hotter. clearing pollution will keep the air cleaner.
