Cardiovascular system-II - CARDIOVASCULAR PHYSIOLOGY...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
BMED 3100 CARDIOVASCULAR PHYSIOLOGY Vessels
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
BMED 3100 Blood flows if pressure gradient is present. Blood flows from higher pressure to lower pressure Flow is opposed by resistance (R). R is function of length of system, radius of vessel, viscosity of blood Q ∝Δ P/R V = Q/A
Background image of page 2
BMED 3100 DISTRIBUTION OF BLOOD IN THE TISSUES skeletal muscles use around 20% and as much as 85% during exercise > 2/3 of CO is routed to digestive tract, liver, muscles, and kidney kidneys have highest flow on a per weight basis precapillary sphincters can constrict, restricting blood flow – local control Capillaries continuous: endothelium closely joined (muscle, brain) fenestrated: have large pores that allow high volumes to pass (kidney, intestine)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
BMED 3100
Background image of page 4
BMED 3100 ARTERIES, CAPILLARIES, AND VEINS arteries (hold 11% of circulating blood) divide into smaller and smaller arterioles (smallest arteries) metareterioles have only part of their wall surrounded by smooth muscle can act as bypass channel directing blood flow past capillary beds – this way regulates flow in beds allow white blood cells (bigger than red blood cells) to bypass microcirculation : arterioles, capillaries, and venules (smallest veins) Veins: more numerous than arteries, larger diameter (hold
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/12/2012 for the course BMED 3110 taught by Professor Staff during the Spring '08 term at Georgia Institute of Technology.

Page1 / 22

Cardiovascular system-II - CARDIOVASCULAR PHYSIOLOGY...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online