Chapter 20 - Cardiovascular System

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How many red blood cells normally fit across the diameter of a capillary?

1

Collateral pathway

Anastomosis

An abnormal bulge in an artery is called a/

Anuerism

Little capacitancy

Arteries

Maintain pressure resivor to get blood to capillaries

Arteries

Take blood away from the heart

Arteries

Small, stays the same in the arteria, gets smaller as they branch, last chance to decade blood flow

Arteriole arteries

3 layers

Artery

High pressure

Artery

No Skeletal Muscle Pump

Artery

No valves

Artery

Small lumen

Artery

Thick wall

Artery

Veins are:

Capactiance vessels

1 layer thick - Simple Squamous Epithelial - Exchange

Capillaries

Exchange, 3 types

Capillaries

What has the biggest volume of: arteries, veins, or capillaries

Capillaries

Feeds tissues, there for exchange

Continuous Capillaries

In a blood pressure measurement of 110/70, the number 70 is th

Disatolic pressure

Pressure resivoirs, stretchy, distributors

Elastic arteries

3 layers of arteries:

Elastic, muscular, arteriole

Filters (little holes) kidneys

Fenestrated

Lumen

Hollow place or opening

Intima

Inner most layer, living in the blood vessel - Simple Squamous Ephitelial

Let plasma out

Intercellular clefts

Tunica

Layers of the vein and arteries - Simple Squamous Epithelial

Media

Middle layer - Smooth Muscle Layer

Exits, less stretchy, thicker terica, distributing

Muscular arteries

Do capillary bodies have blood in them?

No

Blood vessels are

Organs

Externa

Outer most layer - Connective Tissue - Blood supply

Provide blood to tissues for exchange

Perfusion Capillaries

Every place where the metarteriole branches to a capillary

Precapillary sphincter

Lets cells or big things cross (big holes), red bone marrow

Sinusoid (Discontinous sinusoid)

How the blood moves in the veins

Skeletal muscle pump

Gets through capillary beds and lets blood flow

Thouroughfare Channgel

The widening of a vessel is calle

Vasodilation

Big capacitancy

Vein

Big lumen

Vein

Low pressure

Vein

Skeletal Muscle Pump

Vein

Thin wall

Vein

3 layers

Veins

At any one moment most of the bodies blood volume is in the

Veins

Capacity, hold blood

Veins

Carry blood to the heart

Veins

Majority of blood is in: capillaries, veins, or arteries?

Veins

Valves

Veins

Start after capillaries

Venule

Which of the following is associated with veins but not arteries?

a tunica media with abundant elastic fibers

Nervi vasorum control

both vasoconstriction and vasodilation

What are the vessels called that are the functional unit of the circulatory system because all exchange takes place here?

capillaries

These vessels contain large amounts of elastic tissue within the tunica media. What are they called?

elastic arteries

Closer to the heart, arteries would be expected to have a higher percentage of

elastic fibers

Which of the following is associated with arteries but not veins?

external elastic membrane

An especially leaky type of capillary found in the liver and certain other tissues is called a

sinusoid capillary

Which layer of the vessel wall facilitates vasoconstriction and vasodilation?

tunica media

What are the vessels called that are thin-walled and expand easily?

veins


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