HEART - b. Tunica media - thicker, composed of smooth...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1LEARN THE FLOW OF BLOOD THROUGH THE HEART 1. Fibrillation - heart muscle uncoordinated 2. Tachycardia - rapid heart beat (> 100 beats per min) 3. Bradycardia - slow heart beat (< 60 beats) 4. Cardiac output = heart rate X stroke volume = ml blood/min 5. Arteries —> vessel leading blood away from heart, thicker walls, more elastic, blood flow relatively fast 6. Veins —> vessel taking blood back to heart, thinner walls, not too elastic, slower flow, irregular lumen, valves 7. Capillaries 8. Layers a. Inner - tunica intimi, smooth layer - endothelial tissue
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: b. Tunica media - thicker, composed of smooth muscle c. Tunica externa - outer layer 9. Vasoconstriction - opening (lumen) gets smaller 10. Vasodilation - lumen gets larger 11. Artery &gt; arteriole &gt; capillaries - tiniest, one cell thickness, (slowest blood flow), nutrient/gas/waste exchange between body tissues and capillaries 12. Hepatic portal system - filters blood from digestive organs before returning to heart...
View Full Document

This note was uploaded on 04/10/2008 for the course BIOL 109 taught by Professor Mister during the Spring '08 term at UMBC.

Ask a homework question - tutors are online