1. Chapter 8
Section 3
Pages

2. Animals have several levels of Organization
Exoskeleton - a strong but flexible outer covering that supports and protects the animal and also presents it from drying out.

3. Endoskeleton - connective tissue, bones, cartilage, ligaments, and tendons, which grows along with the animal. This is an internal support system for vertebrate animals.

4. Review page 291
Q1. Name the four types of tissues that animals have (7.5.b)

5. A1. The 4 types of tissues than animals have are:
Epithelial
Connective
Nerve
Muscle

6. Q2. What types of tissue is skin made of ? (7.5.b)

7. A2. Skin is made of epithelial, connective, nerve, and muscle tissue

8. Q3. How do the circulatory and respiratory system work together. (7. 5
Q3. How do the circulatory and respiratory system work together? (7.5.b)

9. A3. Circulatory and Respiratory systems work together as follows:
Blood, circulated by the heart, carries oxygen to all parts of the body and picks up carbon dioxide. Blood passes through the lungs of the respiratory system, where it releases waster carbon dioxide and picks up oxygen.

10. Q4. Analyze: Look again at the porcupine on page 287
Q4. Analyze: Look again at the porcupine on page To what system do you think the quills belong, and why?

11. A4. The quills of the porcupine belong to the integumentary system
A4. The quills of the porcupine belong to the integumentary system. The quills function as a protective barrier.

12. Q5. Compare and Contrast:
Blood is classified as connective tissue. How does it seem similar to other connective tissues, and how is it different?

13. A5. Blood/connective tissue
Similar: it can be found in almost all parts of the body.
Different: bones, ligaments, tendons, and cartilage are mainly in the skeletal system.

14. Q6. Synthesize: Do you think it is possible for an organ to function as part of more than one system? Why or why not?

15. A6. An example of an organ functioning as part of more than one system.
Blood travels through blood vessels such as capillaries, which are small organs. Capillaries are part of other organs such as the lungs.