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UNIT TWO - Cells and Systems Unit Review 1. What are the five characteristics of living things? 2. Level of organization in all living things: cell ________________________________ ________________ organism 3. Magnifying an object makes it appear ________________. 4. Parts of a Microscope – know all the parts and describe their function! 5. What are the main differences between uni and multicellular organisms? 6. List the three differences between the plant and animal cells. 7. What is the difference between these membranes. selectively permeable permeable impermeable- 8. What is diffusion? 9. Osmosis is the diffusion of ________________ through the selectively permeable membrane. 10. In both diffusion and osmosis, there is a movement of a substance from ________________ concentration to ________________ concentration. 11. Briefly explain photosynthesis? 12. What are the advantages of being multi-cellular? 28 Tissues are groups of ________________. 31. Organs are several ________________ working together. 29. 30. List at least 8 organs in the human body. ________________ ________________ ________________ ________________ ________________ ________________ ________________ ________________ Systems are several ________________ working together. Circulatory System 34. The Circulatory system consists of the________________, ________________, and blood vessels. 35. Your blood consists of: 36. ________________ carry blood away from your heart and ________________ carry blood back to your heart. 37. The ________________ are the smallest blood vessels. They diffuse oxygen and nutrients across walls into the cells. 38. Draw the path of blood as it travels through the heart. Respiratory System 40. Explain the difference in Inhaling and exhaling while Breathing 41. Pathway of air. Nose ________________- also known as the windpipe ________________- two big tubes ________________- branches into small narrow blood vessels ________________- millions of air sacs( exchange of oxygen/ carbon dioxide) (sound like Chef Boyardee treat) Digestive System Path of Food a. Mouth- ________________ (juice that softens food- enzymes break food down) b. ________________- tube that leads to stomach ________________- (wave-like motion that moves food down) c. ________________- gastric juices break food down. (________________) d. ________________ ________________- 23 ft. long e. ________________ ________________ -wastes are stored here until secretion (dry area) 43. Other organs ________________- insulin secretion ________________- liquid wastes stored here ________________- bile stored here ________________- bile secreted- breaks down fat 44. Components of Blood Components Plasma Red blood cells Platelets White blood cells Main Function