1. Ch. 19 Sec. 1 A Closer Look at Blood Vessels

2. If you took all of the blood vessels out of an average adult, and laid them out in one line, the line would be over 100,000 miles long!

3. Blood vessel FunctionStructure of wall Other info. a artery acarry blood away from heart largest= aorta 3 layers Very thick causes pulse capillaryconnect arteries & veins allow diffusion 1 cell thickmaterials pass thru. easily (oxygen, glucose) veincarry blood to heart 3 layers thinner walls than arteries

4. A Arteries cause your pulse.

5. Factors that help blood move thru. veins: 1.Contraction of skeletal muscles 2.Valves prevent blood from flowing backward 3.Breathing movements

7. Arteries, Capillaries & Veins

8. Unlike the arteries and veins, capillaries are very thin and fragile. The capillaries are actually only one epithelial cell thick. They are so thin that blood cells can only pass through them in single file.

10. coronary arteries supply blood to heart itself 1. Right Coronary Artery 2. Left Coronary Artery

11. blood pressure caused by force w/ which ventricles contract

12. (ventricles contract) (ventricles relax)

14. Blood pressure - measured w/ sphygmomanometer

17. ActivityPulse Rate Resting X 4= bpm Walking Running (1 min) Resting after Exercise (3+ min) Resting after Exercise Predict how your pulse rate will change as you go from resting to being active, then back to resting again.______________________

19. artery, capillary or vein thickest walls artery

20. artery, capillary or vein carry blood away from the heart artery

21. artery, capillary or vein connects 2 blood vessels capillary

22. artery, capillary or vein walls are 3 layers thick artery & vein

23. artery, capillary or vein diffusion occurs here capillary

24. artery, capillary or vein carry blood back to the heart vein

25. artery, capillary or vein causes your pulse artery

27. Alien heart It is the year 2500. The Planet Earth has discovered many new planets which contain life. Some life forms are almost human- like aside from a few features. Your star-ship has just landed on an undiscovered planet. Unfortunately when the star-ship entered the planet's atmosphere a grand ion charge zapped your star-ship's power supply. To repair your star-ship, you need to find the mineral reggeti. You decide you will lead your crew in a search for the substance. In a short time you meet a human-like alien colony, calling themselves Xyphoids. Your crew is excited to meet this population because you hope they know how to locate reggeti. You discover the alien population can speak your language so you inquire about reggeti. To your surprise, the leader knows where the mineral can be found, but he will only you show on one condition. The Xyphoids, ever since their known existence, have hearts which fail at a very young age. For years they have tried to invent an artificial heart without success. The alien population knows your technology is more advance than theirs. They will lead you to the reggeti source if you can successfully make an artificial heart for their population. http://www.pbs.org/wgbh/nova/eheart/transplantwave.html

28. Alien heart ACTIVITY Xyphoid anatomy: 3 chambers in their heart 2 heart valves 1 lung 3 major vena cava entering the heart 2 pulmonary arteries 3 pulmonary veins 2 arteries leaving the heart to supply the body with blood Assignment: 1.Use the PlayDoh and other materials to make a CROSS SECTION (cross section means to leave an area of the heart open so the teacher can observe your internal design) of the heart which corresponds to the Xyphoid anatomy. The heart must work mechanically (meaning the your creation must be able to pump blood to the one lung and bring it back to the heart. Further your valves must be placed in logical positions). (REMEMBER don't mix the PlayDoh!!!) 2.Draw your heart creation on the back of this page (color is encouraged) 3.Label your valves, veins, arteries, chambers and other structures (use original terminology) 4.Describe (use your unique heart labels) how your heart will work mechanically. Describe how it will move the blood to the one lung and out the rest of the body. Name_________________________________ Date __________________