biology

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Across
  1. 4. the number of times the heart beats per minute
  2. 5. the upper chamber of the heart that receives blood coming in from the veins
  3. 7. a condition in which there is thickening and hardening of the arteries
  4. 9. relating to, or affecting the lungs
  5. 10. the lower chamber of the heart that squeezes blood out into the arteries
Down
  1. 1. Cavity a hollow space in the body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart
  2. 2. relating to the blood vessels, which includes the arteries, capillaries, and veins
  3. 3. a different form of a gene that controls a certain trait.
  4. 6. two dominant alleles of a contrasting pair fully expressed at the same time in the heterozygous individual.
  5. 8. the empty space of the heart where blood is contained