Across
- 4. Another name for the "dust cells" in the alveoli
- 7. Inner lining of the 4 heart chambers
- 9. The serous membrane around the lungs
- 12. Steroid hormones are made from this chemical
- 15. The only vein in the body that carries oxygenated blood
- 16. A plasma protein that helps regulate water balance in blood
- 17. The "packed cell volume" of blood
- 21. The cell fragment that aids in hemostasis
- 22. The master gland of the endocrine system
- 23. O- blood is the universal _____
- 24. Blood vessels with valves that return blood to the heart
- 26. Where protein 1st begins to be digested
- 28. The top blood pressure number that represents the heart at work
- 29. The first segment of the large intestine
Down
- 1. The control center of the endocrine system
- 2. Hormones bind to this to give a message to a cell
- 3. The muscular tube behind the trachea
- 5. An accessory digestive organ that secretes buffers & enzymes into the small intestine
- 6. Hormones are transported through this
- 8. The layer of the digestive tract wall that food touches
- 10. Proteins on the surface of red blood cells that determine blood type
- 11. The slow wave of contraction of the muscularis externa
- 12. Blood vessels where gas exchange occurs
- 13. The site of gas exchange in the lungs
- 14. Type of valves that are closed when the heart is making the "dupp" sound
- 18. Lymphocytes are white blood cells that produce _____
- 19. Clusters of protective lymphatic tissue in the back of the throat
- 20. The organelles that line the respiratory tract and sweep away debris
- 25. The enzyme that digest carbohydrates
- 27. The chemical messengers of the endocrine system