U3 S8

Card Set Information

Author:
Iwillacescience
ID:
126688
Filename:
U3 S8
Updated:
2012-01-08 23:17:42
Tags:
LIFE SCIENCE
Folders:

Description:
BODY SYSTEMS
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  1. What are the sides of the heart?
    The right side of the heart pumps oxygen-poor blood to the lungs. The left side pumps oxygen-rich blood to the body.
  2. What are the upper and lower chambers of the heart?
    The upper chambers are atriums. The lower chambers are ventricles.
  3. What are valves?
    Blood enters the atria and is pumped down to the ventricles. Flap like structures called valves are located between the atria and the ventricles where large vessels are attached to the heart. As blood move through the heart, the valves close to prevent blood from going backwards. This closing creates the sound of a beating heart.
  4. What is blood and what does it do?
    Blood is a connective tissue that is part of the cardiovascular system. It serves as a transport system, providing supplies for cells, carrying chemical messages, and removing wastes so cells can maintain homeostasis.
  5. What are arteries?
    An artery is a blood vessel that carries blood away from the heart. Arteries have thick walls with a layer of smooth muscle. Nutrients, oxygen, and other substances must leave the blood to get to your body's cells. CO2 and other wastes leave body cells and are carried away by blood.
  6. What is blood pressure?
    Each of your heartbeats pumps blood into your arteries at high pressure, which is your blood pressure. This pressure pushes blood through the arteries. Artery walls are strong and they stretch to withstand the pressure.
  7. What are capillaries?
    A capillary is a tiny blood vessel that allows these exchanges between body cells and the blood. The gas exchange can take place because capillary walls are only one cell thick.
  8. What are veins?
    A vein is a blood vessel that carries blood back to the heart. Blood in veins is not under as much pressure as blood in arteries is. Valves in the veins keep the blood from flowing backwards. The contraction of skeletal muscles around veins can help blood move in the veins.
  9. What are blood vessels?
    Blood travels throughout your body in tubes called blood vessels. The three types of blood vessels are arteries, capillaries, and veins.
  10. What do arteries, capillaries, and veins do?
    • Arteries carry oxygen-rich blood away from heart.
    • Capillaries deliver oxygen-rich blood to body cells and take oxygen-poor blood away from cells.
    • Veins carry oxygen-poor blood back to the heart.

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