Across
- 4. The _______ node is the hearts natural pacemaker that initiates contractions in the atria
- 7. When the body is too hot your blood vessels enlarge so heat can get lost. This is called _________
- 10. Not enough _______ in blood can make bleeding take longer to stop
- 11. The right __________ pumps oxygen poor blood to the lungs
- 12. ________ blood cells help fight infection and protect the body from pathogens
- 13. Inate immunity uses ________ which is the process of cells "eating" harmful invaders
- 14. Cells produced in bone marrow are considered _______, a type of white blood cell important for immunity
Down
- 1. Blood goes through the _______ valve to enter the left ventricle
- 2. ______ are lymphocytes that attack infected or abnormal cells directly
- 3. When you are bruised this means your __________ are damaged
- 5. The _______ is the largest blood vessel in the body
- 6. Blood from the lungs enters enters the heart through the pulmonary ______
- 8. _______ carry blood away from the heart
- 9. ______ is a protein in red blood cells that help carry oxygen