Your SlideShare is downloading. ×
Sheep Heart Dissection
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Sheep Heart Dissection

4,443

Published on

Published in: Health & Medicine, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
4,443
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
63
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. TJ Medical Society 2008 A Presentation brought to you by: Alison Jarmas, Jerry Liu, Nikhil Prakash, Jimmy Wu, Judy Zeng, and the Officer Corps.
  • 2. Blood Circulation and Atria
  • 3.
    • Blood enters heart through veins: Superior vena cava and Inferior vena cava.
    • Heart muscles in atria contract- push blood into ventricles
    • Ventricles force blood through the arteries.
    • Blood, oxygenated by lungs, flows into left chambers of the heart
    • Aorta pushes blood from heart to the body
  • 4. Blood Flow  Deoxygenated Blood  Oxygenated Blood Blood from tissues throughout body  Superior and Inferior vena cava  Right Atrium  Tricuspid Valve  Right Ventricle  Pulmonary Semilunar Valve  Pulmonary Artery  Lungs 
  • 5. Blood Flow  Deoxygenated Blood  Oxygenated Blood Pulmonary Veins  Left Atrium  Bicuspid (Mitral) Valve  Left Ventricle  Aortic Semilunar Valve  Aorta  Body Tissue 
  • 6.  
  • 7.
    • Hearts have right and left atria
    • Atria relax to fill with blood
    • Atria contract to release blood to body
    • Chambers of heart with thin walls
  • 8. Diastole and Systole
  • 9.
    • Consists of cyclic periods of high or low blood pressure, measured in mmHg
    • Systole – all four heart chambers simultaneously contract to propel blood through the cardiovascular system; causes increased pressure on arterial walls
    • Diastole – the period of relaxation during which blood flows back into the atria and ventricles; causes decreased pressure on arterial walls
    • Represented as systole/diastole (ie. 120/80)
  • 10. RED – aortic pressure BLUE – left ventricular pressure YELLOW – left atrial pressure
  • 11. Ventricles and the “Cardiums”
  • 12.
    • Ventricles
    • Myocardium – muscle tissue
    • Endocardium – tissue that lines the interior of heart
    • Pericardium – sac that contains heart and roots of great blood vessels
  • 13. Valves, Muscles, Tendinae
  • 14. http://www.mitroflow.com/immagini/bassa/0_2005127191719-patients_chambers.jpg
  • 15.
    • Allows blood to enter ventricles
    • Prevents backflow into atriums
    • Connected to papillary muscles by chordae tendinae
    • Tricuspid (right AV)
      • 3 membrane flaps between right atrium and ventricle
    • Bicuspid (mitral or left AV)
      • 2 membrane flaps between left atrium and ventricle
  • 16.
    • Prevents backflow from arteries to ventricles
    • 3 small membranous pockets; crescent-shaped flaps of endocardium
    • Pulmonary (right)
      • Connects pulmonary trunk to right ventricle
    • Aortic (left)
      • Connects aorta to left ventricle
  • 17.
    • Flaps of muscles connected to various valves on one end by chordae tendinae and to ventricular walls on the other
    • Stabilize valves
  • 18.
    • “ heartstrings”
    • Connective tissues connecting valves to papillary muscles
    • Prevent valves from being turned inside out
  • 19. www.byedr.com/medicine/1781-medicine-5.html
  • 20. Aorta
  • 21.
    • The largest artery in the body: stems from LV and brings oxygenated blood to all parts of body in systemic circulation.
    Diagram of Aorta in SHEEP
  • 22. Pulmonary Circulation
  • 23.
    • Serves to oxygenate the depleted blood
    • Circuit led in to by the pulmonary trunk (artery)
    • Systemic circulation  vena cava  right atrium  right ventricle  pulmonary artery (right and left)  lungs (capillary beds)  pulmonary veins (right and left)  left atrium  left ventricle  aorta  systemic circulation
  • 24.
    • Arterioles intertwined with tubular bronchioles bring deoxygenated blood away from the heart
    • Capillary beds in the saclike alveoli have increased surface area for gas exchange by diffusion (facilitated by a partial pressure gradient)
    • Venules carry newly
    • oxygenated blood
    • back to the heart
  • 25.  
  • 26.
    • A blood vessel that ALWAYS carries blood toward the heart
    • Generally contains deoxygenated blood, except for the pulmonary and umbilical veins
    • Path: Right Atrium  Right Ventricle  Pulmonary Arteries  Lungs  Becomes oxygenated
    • Very low blood pressure- rely on skeletal-muscle pump
    • Smallest veins are the venules
  • 27.
    • Three Layers
      • Tunica Adventitia: Outer covering of vessel; composed of connective tissue, collagen, and elastic fiber
      • Tunica Media: Middle layer; composed of smooth muscle and elastic fiber
      • Tunica Intima: Inner layer; composed of an elastic membrane lining and smooth endothelium
  • 28.
    • Types:
    • Portal and Nonportal
    • Superficial and Deep
    • Pulmonary and Systemic
    • Major Ones:
    • Great Saphenous vein (GSV) – located in lower limbs
    • Pulmonary veins: carry oxygenated air to the lungs
    • Jugular Vein
    • Inferior and Superior Vena Cava
  • 29. Cranial/Caudal Vena Cava
  • 30. Cranial/Caudal Vena Cava
  • 31. Arteries
  • 32.
    • Arteries are a type of blood vessel in the circulatory system. They generally carry blood away from the heart to the rest of the body.
    • The further away from the heart, the smaller the arteries get until they become arterioles
  • 33.
    • Arteries are tough on the outside, muscular in the middle to help force blood throughout, and smooth on the inside.
    • Generally arteries are thicker than veins because they need to withstand greater pressure
  • 34.
    • Aorta
    • Common carotids
    • Common iliacs
    • Pulmonary trunk
  • 35. Arterioles, Venules, Capillaries
  • 36.
    • http://www.deconstructdesign.com/st_projects/mm_mania_2003/the_heart/functions.htm
    • Capillaries are the connectors between arterioles and venules.
      • Smallest blood vessels that are involved in regulation of osmotic pressure (internal body heat)
      • Capillary wall consists of only the endothelium.
    • Venules are small blood vessels that allow deoxygenated blood to flow from capillary beds to veins.
      • Has endothelial membrane, muscle/elastic tissue, and fibrous connective tissue.
  • 37.
    • Arterioles are the blood vessels from the arteries to the capillaries.
    • Blood pressure in arteries = result o work needed to pump cardiac output through the vascular resistance.
  • 38. © TJHSST Medical Society 2007-2008

×