The Anatomy and Physiology of Animals/Test Yourselves/Heart and Circulation Test Yourself/Heart and Circulation Test Yourself Answers

1. Via what vessel does blood enter the heart from the body?
 * Blood enter the heart from the body via the cranial and caudal vena cavae.

2. Blood passing through the right atrioventricular valve passes into which chamber of the heart?
 * Into the right ventricle.

3. What is the function of the pulmonary valve?
 * The pulmonary valve prevents backflow of blood from the pulmonary artery into the right ventricle.

4. Does the pulmonary artery carry deoxygenated or oxygenated blood?
 * The pulmonary artery carries deoxygenated blood.

5. The walls of the heart are made of what tissue?
 * The walls of the heart are made of cardiac muscle.

6. Does the aorta carry deoxygenated or oxygenated blood?
 * The aorta carries oxygenated blood.

7. Does the pulse pass down arteries or veins?
 * The pulse passes down arteries.

8. Give 2 other differences between arteries and veins. Arteries have thicker walls than veins. Veins have valves to prevent backflow of blood.

9. What is systole?
 * Systole is the period when the ventricles are contracting and sending a wave of high-pressure blood (the pulse) along the aorta and arteries of the body.

10. Circle the correct answer below. Blood flows by this route through the blood vessels of the body.
 * b) heart | arteries | capillaries | veins | heart

11. Name the vessel that carries blood:
 * from the heart to the main organs of the body:aorta
 * from the aorta to the brain: carotid artery
 * from the aorta to the kidneys: renal artery
 * from the intestines to the liver: hepatic portal vessel
 * from the aorta to the heart muscle: coronary artery