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4.1. Heart Anatomy

4.1. Heart Anatomy. Orientation. Which side is left?. Which side is left?. External Anatomy—panel 1. Aorta. Pulmonary arteries. Pulmonary veins. Superior Vena Cava. Left atrium.

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4.1. Heart Anatomy

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  1. 4.1. Heart Anatomy

  2. Orientation Which side is left? Which side is left?

  3. External Anatomy—panel 1 Aorta Pulmonary arteries Pulmonary veins Superior Vena Cava Left atrium Coronary Artery—”feeds” the heart itself (can only see from anterior/front view), coronary means “crown/wreath” and surrounds heart like a crown Right atrium Inferior Vena Cava Left ventricle Right ventricle Apex (from Latin, “point/tip,” points toward left)

  4. Prep for HW and then add flow as we go through it in class

  5. Heart Flow—panels 2-3 Video showing blood flow 3D animation Really corny video quiz—test yourself Left side: Systemic Pump Right side: Pulmonary Pump

  6. Heart Structures—panels 4-5 To make the booklets, use 4 half-sheets of paper, cut hamburger style

  7. To make the shutters, use 4 half-sheets of paper, cut hamburger style. Then fold them into shutters. Leave shutters as are on 2 of them (for right side booklets) and cut into 4 pieces on the other 2 for left side booklets). Wait to label (see next 2 slides) Booklet insides Left side style Right side style

  8. Page 4 Heart Structures—shutter labeling Chambers Valves I chose to use pink/red to color code right side structures and blue for right ones. That is optional, but encouraged to show which structures hold oxygenated blood.

  9. Page 5 Heart Structures Veins Arteries

  10. Chambers • How many? • FOUR (in humans) • Job • Hold blood

  11. Atria Etymology: from Latin atrium "central court or main room of an ancient Roman house, room which contains the hearth” http://www.etymonline.com/index.php?term=atrium • How many? • TWO • Job • Receive blood

  12. Right atrium • Job • Receives blood from whole body (blood that lacks oxygen)

  13. Left atrium • Job • Receives blood from lungs (that picked up oxygen)

  14. Ventricles Etymology: From Latin word meaning “belly,” they make up most of the open/hollow portion of the heart • Job • Push blood out of heart (surrounded by muscle to help squeeze it out)

  15. Right ventricle • Job • Send blood to lungs (less muscle needed because lungs are right next to the heart!)—sends it there to get oxygen

  16. Left ventricle • Job • Send blood to WHOLE BODY to deliver oxygen and nutrients

  17. Valves • How many? • FOUR • Job • Prevent backflow of blood Go here for info about valves and a good video about why they are necessary

  18. Tricuspid Valve • Etymology: Tri means 3 and cusp means points • Job • Allows blood to flow from RA to RV and not to flow back into RA

  19. Pulmonary Valve • Etymology: From Latin “pulmo,” meaning lungs—blood passing through this valve is headed to the lungs! • Job • Allows blood to flow from RV into pulmonary artery and not flow back into RV

  20. Bicuspid (Mitral) Valve • Etymology: Bi means 2 and cusp means points • Job • Allows blood to flow from LA to LV and not to flow back into LA

  21. Aortic Valve • Etymology: From Latin “to raise” • Job • Allows blood to flow from LV into aorta and not flow back into LV

  22. Veins • Job • Carry blood TO HEART • While MOST carry blood lacking oxygen, not ALL do, so that is NOT a defining feature of veins

  23. Vena Cavas • Job • Carry blood to the RIGHT SIDE of the heart • SUPERIOR (meaning “above” carries it from the upper body—arms and head) • INFERIOR (meaning “below” carries it from the lower body—abdomen and legs)

  24. Pulmonary Veins • Job • Carry blood from lungs to LA (remember, pulmonary means lungs and veins come TO THE heart) • What’s strange? • THEY ARE THE ONLY VEINS THAT CARRY BLOOD WITH OXGYEN • Right pulmonary vein • #4 • Left pulmonary vein • #6

  25. Pulmonary Arteries • Job • Carry blood to lungs from RV (remember, pulmonary means lungs and arteries lead FROM THE heart) • What’s strange? • THEY ARE THE ONLY ARTERIES THAT CARRY BLOOD LACKING OXGYEN • Right pulmonary artery • #1 • Left pulmonary artery • #3

  26. Aorta • Job • Carries blood leaving heart to whole body (branches into many smaller arteries to do so)

  27. Veins vs. Arteries • Veins • Must prevent blood from backing up • Have tiny valves • Arteries • Must withstand high pressure • Have thick walls

  28. Heart Dissection • Can you use what you’ve learned to interpret a REAL heart?? (this goes onto panel 6)

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