Register to reply

Blood pressure to make Blood Flow Thru Artery

by dvolpe
Tags: artery, blood, flow, pressure
Share this thread:
Nov2-10, 11:09 AM
P: 37
1. The problem statement, all variables and given/known data
What is the blook pressure difference required to make blood flow thru a capillary of radius 3.0 um and length 1.1 mm at a rate of 0.56 mm/s?

2. Relevant equations
P1 - P2 = ave speed (8nL) /r squared

3. The attempt at a solution
n of blood = 4 x 10 e-3 m/s
ave speed = 5.6 x 10e-4 m/s
r = 3.0 um = 3 x 10e-6 m
l = 1.1 mm = 1.1 x 10e-3 m

P1-P2 = 5.6 x 10e-4 * 8 * 4 x 10e-3 * 1.1 x 10e-3/(3 x 10e-6)squared
P1-P2 = 21.90 x 10e2 or 2190 Pa

This seems high? Are my logic and math correct?
Phys.Org News Partner Science news on
Wildfires and other burns play bigger role in climate change, professor finds
SR Labs research to expose BadUSB next week in Vegas
New study advances 'DNA revolution,' tells butterflies' evolutionary history

Register to reply

Related Discussions
Physics behind blood vessel constriction and blood pressure? General Physics 6
Pressure difference to maintain blood flow Advanced Physics Homework 4
Find the average rate of flow of blood - artery Calculus & Beyond Homework 1
Flow of blood Introductory Physics Homework 2