1. Day 1 – Circulatory Anatomy
Circulatory System
Day 1 – Circulatory Anatomy
4 slides, 2 drawings

2. Main Ideas
Anatomy – left vs right; atria vs ventricles; arteries vs. veins

3. Types of Blood Vessels
Arteries
Arterioles
Capillaries
Venules
Veins

4. Arteries Arterioles Thick, muscular walls Elastic Smaller arteries
Huge pressure from heart
Elastic
Handle change in blood volume after each contraction
Smaller arteries
Not as elastic

5. Capillaries
Site of GAS EXCHANGE!
moves via diffusion
very thin walls

6. http://highered. mcgraw-hill
Determined by two forces:
Blood Pressure
Osmotic Pressure (the pressure that water feels to move according to the concentration gradient between the tissues and the blood

7. Veins & Venules Venules = small veins
Both move blood back towards the heart
low pressure – need valves, skeletal muscles

10. Varicose Veins (don’t write!)
If the valves malfunction in the legs, a painful condition can result
Called Varicose veins
Allows blood to pool in the elastic veins, causing them to bulge

13. Heart Note that anatomy is always RELATIVE TO THE PATIENT
Draw on ipad – right is on left etc.

14. Heart Diagram
Ipad ipad ipad ipad

16. Heart Diagram
Ipad ipad ipad ipad

17. Heart Valves prevent backflow
b/n atria and ventricles = atrioventricular valves
Exit ventricles = semi-lunar valves
Defective valve = heart murmur
Both atria fill and contract at the same time.
Both ventricles will fill and contract at the same time
Atria, ventricles, septum, aorta, vena cava
Draw on IPAD!!!

18. Heart Chordae tendineae – anchor AV valves, prevent inverting
Draw on IPAD!!!

21. The first heart sound, “lub” occurs when the AV valves close
The first heart sound, “lub” occurs when the AV valves close. The second heart sound “dub” occurs when the other valves close.

22. Chordae Tendineae

23. To Do’s Questions (next slide)
Provincial Q’s # 6, 7, 10, 16, 20, 21, 24, 26, 28, 30, 36, 39, 41, 49
Dictionary
Arteriole, venule, septum, atrium, ventricle, atrioventricular valve, semi-lunar valves, Chordae tendineae, aorta, vena cava
14 q’s in total!

24. Questions
1. Why are the valves important? 2. Draw a diagram of the heart. Label blood flow through the heart, to the body and to the lungs! 3. Why are arteries thicker-walled than veins? 4. What things help the blood return to the heart in the veins? 5. Why does your heart need to pump blood around your body?

25. Questions Why are the valves important?
Why do we consider anatomy relative to the patient, and not us?
Why are arteries thicker-walled than veins?
What things help the blood return to the heart in the veins?
Sketch a picture of the heart; label with functions!