![(6) Cardiac Valves
• [4 main valves]
• When the heart is relaxed…
– Blood passively fills atrium
– Flows right past tricuspid / bicuspid valves
– Semilunar Valves remain shut
• When the heart contracts (pumps)…
– Tricuspid / Bicuspid valves swing up and shut
– Blood ejected out of ventricle
– Semilunar Valves open up](https://image.slidesharecdn.com/heartanatomyandfunctions-200506035945/85/Heart-anatomy-and-functions-9-320.jpg)
Heart anatomy and functions
- 2. (1) Cardiovascular Function • Cardiovascular= Heart, Arteries, Veins, Blood • Function: –Transportation –Blood = transport vehicle –Carries oxygen, nutrients, wastes, and hormones –Movement provided by pumping of heart
- 3. (2) Cardiac Tissues • Outermost = Pericardium & Epicardium – Pericardium is a membrane anchoring heart to diaphragm and sternum – Pericardium secretes lubricant (serous fluid) – Epicardium is outermost muscle tissue • Middle = Myocardium – Contains contractile muscle fibers • Innermost = Endocardium – Lines Cardiac Chambers
- 5. (3) Cardiac Chambers • Human heart has 4 chambers – 2 Atria • Superior = primary receiving chambers, do not actually pump • Blood flows into atria – 2 Ventricles • Pump blood • Contraction = blood sent out of heart + circulated • Chambers are separated by septum… – Due to separate chambers, heart functions as double pump
- 7. (4) Pulmonary Circulation • Pulmonary= Deoxygenated Blood • Involves Right Side of Heart • Pathway: 1. Superior / Inferior Vena Cava 2. Right Atrium Tricuspid Valve 3. Right Ventricle Pulmonary Semilunar Valve 4.Left Pulmonary Artery 5. Lungs
- 8. (5) Systemic Circulation • Systemic= Oxygenated Blood • Involves Left Side of Heart • Pathway: 1. Left Pulmonary Vein 2. Left Atrium Bicuspid Valve 3. Left Ventricle Aortic Semilunar Valve 4. Aorta 5. All Other Tissues
- 9. (6) Cardiac Valves • [4 main valves] • When the heart is relaxed… – Blood passively fills atrium – Flows right past tricuspid / bicuspid valves – Semilunar Valves remain shut • When the heart contracts (pumps)… – Tricuspid / Bicuspid valves swing up and shut – Blood ejected out of ventricle – Semilunar Valves open up
- 10. THANK YOU