Which of the following body systems facilitates (but doesn't regulate) the functions of the other systems? respiratory system endocrine system digestive system circulatory system

Which of the following statements regarding the insect tracheal system is/are correct? Select True or False for each statement.

T/F Tracheae dilate and constrict during flight or other types of movement, functioning as a 'breathing' mechanism.

T/F Spiracles open into the body cavity, allowing direct contact between the air and hemolymph.

T/F Tracheae carry oxygen to alveoli; here the oxygen diffuses into the hemolymph to be delivered to tissues.

T/F Spiracles can close to minimize water loss.

Blood returning to the mammalian heart in a pulmonary vein drains first into the

a. Left atrium

b. Right atrium

c. Left ventricle

d. Right ventricle

Label the parts of the human respiratory system.

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Identify at least two advantages of breathing air instead of water.

Which of the following is the main difference between your cardiovascular system and that of a fish?

a. Your heart has two chambers; a fish heart has four.

b. Your circulation has two circuits; fish circulation has one.

c. Your heart chambers are called atria and ventricles.

d. Yours is a closed system; the fish's is an open system.

Describe the disadvantages of an open circulatory system relative to a closed circulatory system.

One feature that amphibians and humans have in common is

a. The number of heart chambers.

b. A complete separation of circuits for circulation.

c. The number of circuits for circulation.

d. A low blood pressure in the systemic circuit.

If a molecule of CO₂ released into the blood in your left toe is exhaled from your nose, it must pass through all of the following except

a. The pulmonary vein.

b. The trachea.

c. The right atrium.

d. The right ventricle.