| ACT #8: THE HEART-A Very Important Muscle and an Introduction to the Circulatory System
In your notebook make a sketch of the heart, using the human heart provided by your teacher. A) Please label: the superior and inferior vena cava, the arch of the aorta, pulmonary arteries, left and right pulmonary veins, left and right atria (plural of atrium), left and right ventricles, the right and left AV valves, the septum, and right and left semilunar valves. You can also use text pg. 564. The heart is the pump for your circulatory system. It is made up of cardiac muscle fibers which contracts to force blood through your body. It is enclosed in a tough sac called the pericardium. B) Parts of the HEART: 1. What is the function of the thin-walled atria? 2. What is the function of the thick-walled ventricles? 3. What is the function of the tricupsid and bicupsid values? 4. Arteries carry blood in which direction in relation to the heart? 5. Veins carry blood in which direction in relation to the heart? 6. The word PULMONARY involves what other organ? ACT #9 : THE HEART CALCULATIONS: Say your hearts beats on average 65 times per minute: A) How many times a day (24 hours) will your heart beat? B) How many times in a year (365 days)? C) How many times in an average lifetime (80 years)? D) What is a cardiac cycle? What is SYSTOLE? What is DIASTOLE? E) What is the driving force for blood circulation? WOW! During a 1-year period, your heart pumps enough blood to fill an Olympic size pool. |