1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Circulation, Blood & Respiration Nervous Digestion & Excretion Ecology Skeletal & Muscular

2. The iron-containing molecule in red blood cells

3. HEMOGLOBIN

4. Type of blood vessel that has valves

5. VEINS

6. Type of blood cell that carries respiratory gases (oxygen and carbon dioxide)

7. RED

8. This covers the air passageway of the pharynx when swallowing

9. EPIGLOTTIS

10. The actual site for gas exchange

11. ALVEOLI

12. Type of muscle found in the heart

13. CARDIAC

14. Type of muscle not under conscious control and that can change diameter of blood vessels as well as move food through the digestive tract

15. SMOOTH

16. In a fetus, most bones are originally made of this

17. CARTILAGE

18. Attach bones to muscles

19. TENDONS

20. Substance found in hair, nails, and skin

21. KERATIN

22. Extensions at one end of neuron that receive input

23. DENDRITES

24. Two parts to the central nervous system

25. BRAIN & SPINAL CORD

26. Sensory receptors essential for balance are located here

27. SEMICIRCULAR CANALS OF INNER EAR

28. What type of neuron transmit messages from the environment to spinal cord and brain

29. SENSORY NEURONS

30. Sensory receptors essential for hearing are located here

31. CHOCHLEA OF INNER EAR

32. The substance made by the liver, stored in the gall bladder used to break down fat globules

33. BILE

34. The toxic substance made by the liver that eventually gets filtered out of the blood by the kidneys

35. UREA

36. Skin disorder caused by a blockage of oil glands

37. ACNE

38. Most products of digestion are absorbed in which part of the digestive system?

39. SMALL INTESTINES

40. Wavelike contractions of muscle that move food through the digestive system

41. PERISALISIS

42. What is an organism’s role in its ecosystem called?

43. NICHE

44. Major ecosystems that occur over wide areas of land

45. BIOMES

46. The specific physical location in which a given species lives?

47. HABITAT

48. In a food web, which type of organism receives energy from every other type?

49. DECOMPOSERS

50. Which type of succession would most likely occur after a forest fire?

51. SECONDARY SUCCESSION