Transport in Mammals

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5

6

8

arteries

veins

venules

capillaries

Artery

Vein

Capillary

smooth elastic tissues

muscular tissues

valves

right atrium

left atrium

left ventricle

right ventricle

arteriole --> artery --> capillary --> vein --> venule

artery --> vein --> capillary --> venule --> arteriole

venule --> vein --> capillary --> artery --> arteriole

artery --> arteriole --> capillary --> venule --> vein

It is a small vein

It connects arteries to capillaries

It ensures that blood containing wastes is taken away from organs by veins

It usually carries oxygenated blood

It is a small artery

It connects arteries to capillaries

It contains smooth muscle that can contract and relax

It controls blood flow to different organs by changing its diameter

it carries blood back to the heart

it has a thick layer of elastic tissue

it has a thin layer of muscle tissue

it has a narrow lumen

it carries blood at a high pressure

it always carries oxygenated blood

it carries blood away from the heart

it has an outer layer of connective tissue

contract.

relax.

not burst under high pressure.

stretch and recoil to help push blood along it.

help maintain blood pressure.

carry out peristalsis.

to push blood along through peristalsis.

to prevent the blood vessel from bursting.

to maintain blood pressure.

the blood vessel in elastic recoil in order to push the blood along during diastole.

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2

3

4

Artery

Lumen

Gap

Capillary wall

Venules

Arterioles

Veins

Capillaries

Venules

Arterioles

Veins

Capillaries