Download Discussion Sheet for Cir System 2013

Circulatory System Discussion Sheet
Anatomy & Physiology 2013
Part I – The Heart
1. Justify the development of the circulatory system in terms of its role as a delivery system in the
body. Why does the system ‘make sense?’
2. The circulatory system is called a ‘system.’ Why?
3. How does the thick walled ‘form’ of the ventricles insure that its ‘function’ is met successfully?
4. What causes the heart sounds?
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
5. List several characteristics of the hearts internal location and facts about its structure.
6. How is the heart actually ‘attached’ inside of the body? What important structures are involved
in this attachment? Why is this necessary?
7. Describe the three layers of the heart wall muscle. (see additional handout)
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
8. What are the overall role(s) of the heart valves?
9. What structures help ‘control’ the action of the valves?
10. Name the two kinds of heart valves and the location in the heart.
11. For every trip the blood makes through the body – how often must it circulate through the
heart?
Focus at this point on the pulmonary and systemic circuits of blood flow through the heart.
Read over the handouts provided regarding the electrical activity in the heart.
12. Make a sketch of a heart on the next page (general) and then draw the flow of electricity
through the heart. Use letters in addition to a colored line to show the progression
A. Sinoatrial node
B. Wave across atria
C. AV node
D. Interventricular septum
E. Bundle of HIS
F. Flow across apex and ventricles.
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
13. Relate the flow of blood in the heart to the blood pressure measurements.
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
Part II – Vessels
Arteries Arterioles Capillaries Veins
14. Arteries are under a great amount of pressure from heart contraction. How does their structure
compensate for all of this pressure?
15. What is a coronary bypass?
16. The blood in veins is under low pressure – why? What special modifications are found in veins to
aid them in returning blood to the heart from the body?
17. Capillaries have very thin walls. How does this characteristic aid them in their overall role in
the body?
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
18. In the space below, create a chart that includes all of the stops that the blood makes in the
body as it flows from the heart and back again. Include a column for the name of the stop and
what is accomplished there.
17. How are the above activities related to the circulatory systems function to maintain body
homeostasis?
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
Part III – The Blood Cells
19. Describe the parts of the blood and what is contained within the parts.
20. Why is the ‘stem’ cell in the blood so important?
21. Describe the red blood cell. How big it is? How long does it last? What is its function?
22. Describe the role of the hemoglobin molecule. Where is it located inside of the blood?
Circulatory System Discussion Sheet
Anatomy & Physiology 2013
23. Take apart the hemoglobin molecule and explain its parts. Describe the overall role or purpose
of each part. Make a sketch if you like!
24. What is the difference between deoxyhemoglobin and oxyhemoglobin?
Read over the handout on White Blood Cells
25. Review the slide on blood clotting and be able state the basic steps.
26. Review the slide on cardiovascular disease and be able to explain how it causes serious illness.
Circulatory System Discussion Sheet
Anatomy & Physiology 2013