Principles of Blood Flow | Study Guide - Edubirdie

University:
Glendale Community College
Course:
BIO160 | Introduction to Human Anatomy and Physiology
Academic year:

2019
Views:

178

Pages:

2
Author:

Brynlee Poole

Chapter 20 Principles of Blood Flow • Blood Flow: amount of blood flowing through a tissue in a given time (ml/min) • Perfusion: rate of blood flow per given mass of tissue (ml/min/g) • Important for delivery of nutrients and oxygen, and removal of metabolic wastes Variations in Blood Flow in the Circulatory System • From aorta to capillaries, blood pressure and flow DECREASES because: – friction between blood and vessels – smaller radii of arterioles and capillaries – farther from the heart, more vessels, greater total cross sectional area • From capillaries to vena cava, rate of flow INCREASES because: – large amount of blood is funneled back into fewer vessels.

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