1. Oxygen and nutrients must get to all parts of the body so that energy can be obtained. Examples of adapted circulatory systems will vary.
2. A closed system has a continuous system of vessels. An open system has areas where the vessels are not continuous.
3. Pigments increase the oxygen carrying capacity of the system.
4. Answers will vary.
5. No organelles = more room for hemoglobin (and therefore oxygen); biconcave disc folds; glycolytic enzymes for ATP. Other answers possible.
6. Clotting. Excessive bleeding or extended amounts of time necessary for clotting.
7. Numerous answers possible.
8. Opening and closing of the valves. Right side sends blood to the lungs; left side sends blood to the body.
9. Constriction. Students might want to answer this question as, "What types of events would cause the blood pressure to rise? How specifically would the blood vessels be reacting?"
10. Answers will vary but should include cancer.
11. Tissue fluids drained from blood vessels and not returned. Negative pressure within the lymphatic capillaries.
TO THINK ABOUT
1. EPO specifics are found on page 715. Answers will vary on the other part of the question.
2. From a lymph node itself, cells or substances can spread throughout the body.
3. Colony-stimulating factors.
4. Answers will vary.
5. For some reason, his body is not getting the oxygen it needs.
6. Clot can cause damage to spread.
7. Circulatory system would have to work harder to get the oxygen around.
feedback form |
permissions |
international |
locate your campus rep |
request a review copy
Copyright ©2001 The McGraw-Hill Companies.
digital solutions |
publish with us |
customer service |
mhhe home
Any use is subject to the
Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of the
The McGraw-Hill Companies.