Chapter 8 Crossword

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Across
  1. 3. muscular tissue of the heart
  2. 4. a blood vessel that carries blood away from the heart: it has a relatively thick wall and contains large amounts of elastic fibers
  3. 6. the lower chambers on the heart, blood flows into them from the atria, and then is squeezed out into the arteries. Blood from the left flows into the aorta and blood from the right flows into the pulmonary arteries.
  4. 12. keep the blood flowing in the right direction; these allow blood to move towards the heart but not away from it.
  5. 14. cycle the sequence of events taking place during one heart beat.
  6. 15. the large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.
  7. 17. as blood leaves a capillary bed, the capillaries gradually join with one another, forming larger vessels called _______. These join to form veins.
  8. 18. a tissue that lines the inside of a structure , such as the inner surface of a blood vessel.
  9. 19. valve between the right atrium and the right ventricle.
Down
  1. 1. separates the two chamber on the right of the heart from the two chambers on the left.
  2. 2. small blood vessels that carry blood from arteries to capillaries: they determine how much blood flows through capillaries.
  3. 5. Running vertically on the right-hand side of the heart are the two large veins, one brining blood downwards from the head and the other bringing it up-wards from the rest of the body.
  4. 7. externa an outer layer of arteries; containing elastic fibers and collagen fibers.
  5. 8. Describes muscle tissue (heart muscle) that generates its own contractions.
  6. 9. maintaining a relatively constant environment for the cells within the body
  7. 10. bring blood back to the heart from the left and right lungs.
  8. 11. Visually, they look like wrinkled pouch-like structures. Their purpose is to increase the capacity of the atrium, and so also increase the volume of blood that it is able to contain.
  9. 13. A hollow, muscular organ that pumps blood throughout the body.
  10. 16. The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.