The Anatomy and Physiology of Animals/Heart Worksheet

Chapter 8 The Heart

1. The diagram below shows an external view of the mammalian heart.

Show the positions of the following structures on the diagram.
 * Right atrium, left atrium, right ventricle, left ventricle, aorta, caudal vena cava,


 * pulmonary artery, coronary artery, cranial vena cava.



2. The diagram below shows a section through the heart seen from the same direction as the external view in question 1.
 * a) Label the following structures:
 * right and left atria, right and left ventricles, caudal and cranial vena cava, aorta, pulmonary artery and vein,
 * right and left atria, right and left ventricles, caudal and cranial vena cava, aorta, pulmonary artery and vein,


 * right and left atrio-ventricular valves, pulmonary and aortic semilunar valves.




 * b) On the diagram of the heart shown above indicate the direction of blood flow through the heart. Use red to show the pathway of oxygen-rich blood and blue the pathway of oxygen-poor blood.

3. Choose terms from the list to complete the sentences below.
 * atria; right hand side; vena cava; ventricles; atrioventricular valves; pacemaker;
 * pulmonary artery; veins; arteries; left hand side; aorta, coronary artery;


 * The top two chambers of the heart are called......................
 * These structures stop blood flowing backwards into the atria.
 * This side of the heart receives oxygenated blood.
 * This is the largest artery in the body. It carries blood to the brain and organs.
 * These are blood vessels that carry blood towards the heart.
 * This structure sets the speed of the heat beats.
 * This blood vessel supplies the heart muscle with oxygenated blood?

4. Fill in the name of the blood vessel in the table below. 5. What is the odd one out?
 * a) Right atrium, right ventricle, pulmonary artery, caudal vena cava, aorta,
 * b) Left atrium, left ventricle, right ventricle, pulmonary veins, aorta, coronary artery

6. Arrange these events in the correct order starting with F.
 * A. The left ventricle contracts and blood flows along the aorta to the body
 * B. The blood flows through the right atrio-ventricular valve into the right ventricle.
 * C. Oxygenated blood flows along the pulmonary veins into the left atrium
 * D. The blood passes through the left atrio-ventricular valve into the left ventricle
 * E. The left atrium contracts
 * F. Deoxygenated blood flows from the caudal and cranial vena cavae into the right atrium.
 * G. The deoxygenated blood picks up oxygen
 * H. The right atrium contracts
 * I. The right ventricle contracts and blood flows along the pulmonary artery to the lungs

7. The first heart sound is produced by:
 * a) The semilunar valves closing
 * b) The atrio-ventricular valves closing
 * c) A hole in the heart
 * d) Malfunction of the valves

8. The second heart sound is caused by:
 * a) The semilunar valves closing
 * b) The semilunar and atrio-ventricular valves closing
 * c) The pacemaker
 * d) The atrio-ventricular valves closing

/Worksheet Answers/