Zoo 26

1. supplies all the cells, tissues, and organs of the body with oxygen rich blood and returns oxygen poor blood to heart.
4. the intake of air
5. respiratory organs that have either thin moist vascularized layer of epidermis to permit gas exchange across thin gill membranes or a very thin layer of epidermis over highly vascularized dermis
8. the most numerous of the white blood cells
10. straw colored liquid part of blood
11. the outflow of air
12. scavengers that destroy microorganisms at infection sites remove foreign chemicals and remove debris that result from dead or injured cells.
15. elastic blood vessels that carry blood away from the heart to organs and tissue in the body.
16. use gills for water breathing and lungs for air breathing.
17. moves gasses into and out of the organism
19. the maximum pressure achieved during ventricular contraction
20. The circulating fluid of animals with an open circulatory system

1. bladder an air sac located dorsal to the digestive tract in the body of many modern fishes.
2. integumentary exchange to supplement gas exchange
3. phase of relaxation.
6. internal sac shaped respiratory organ.
7. supplies blood only to the lungs
9. extracellular fluid that accumulates in the lymph vessels.
13. Least numerous WBC
14. An iron containing protein
18. phase of contraction