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BloodBlood

www.geneseelapeer-redcross.org/

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FunctionFunction of Bloodof BloodTransports nutrients

Transports gases (oxygen, carbon dioxide)Transports hormones

Defense system

Helps heal body

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TheHeartThe

Heart

http://www.bestanimations.com/Humans/Organs/Organs.html

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TheHeartThe

Heart

Pumps blood to the

lungs

Pumps blood to therest of the body

Cardiac cycle

http://w3.dwm.ks.edu.tw/bio/activelearner/42/images/ch42c3.gif

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Cardiac

Cyc

leCar

diac

Cyc

le

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Veins,

Arteries

an

dCapi

lleries

Veins,

Arteries

an

dCapi

lleries

VeinsVeins carry blood back

to the heart, ie. To the

heart from the lungsand from the rest of

the body

Thin walls, have

valves

http://www.whybevein.com/valve_good.gif

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Veins,

Arteries

an

dCapi

lleries

Veins,

Arteries

an

dCapi

lleries

ArteriesArteries carry blood

away from the heart,

ie. To the lung, and tothe rest of the body

Very elastic

http://www.cardiologiapertutti.org/Immagini/CV%20-%20Aorta%20toracica%20e%20addominale.jpg

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Veins,

Arteries

an

dCapi

lleries

Veins,

Arteries

an

dCapi

lleries

Capilleries

Site of gas exchange

Very thin (1 cell thick)

www.jcu.edu/ biology/RESP1.HTM

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BloodBlood

Blood can be

seperated into solid

and liquid portions-Cells in liquid

4-6 Litres in our body

55%is plasma (liquid)

45% is solids

http://www.pennhealth.com/health_info/bloodless/images/19432.jpg

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Solids

Porti

ons

Solids

Porti

ons

Red blood cells

White blood cells

Platelets

www.colorado.edu/.../ image/figure11c.jpg

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Red Blood

Cells

Red Blood

Cells

5-6 million/mm3

Shaped like a disc or a

donut

Carries oxygen

www.cellsalive.com

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Red Blood

Cells

Red Blood

Cells

Very rich in

hemoglobin

Hemoglobin carriesoxygen

Therefore red blood

cells carry oxygen

www.kacr.or.kr/library/ itemview.asp?no=750&pa...

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White

BloodCe

lls

White

BloodCe

lls

Responsible for

defense

Attack invaders of thebody

Immune response

5,000-10,000/mm3

people.hofstra.edu/.../ engg81/blood.html

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Plate

lets

Plate

lets

No nuclei

Important in blood

clotting

meds.queensu.ca/.../ hemonc/interp/slide37.html

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Hea

ling

Hea

ling

When we break a

vessels, platelets repair

the break

www.astrographics.com/ cgi-bin/ase/ase.cgi?aff

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Cholester

olCh

olester

ol

Too many fatty foods

cause a build up of

cholesterol, plaquein the veins and

arteries

What happens when

cholesterol builds upin our veins and

arteries?http://www.tooelehealth.org/A_Assets/Images/Cardiovascular/Cholesterol/Plaque_In_Arteries.gif

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Heart

attack

Heart

attack

Blockage of an arterie

to the heart

Can be fatal

www.fda.gov/fdac/ features/1999/attack.html

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Str

oke

Str

oke

Lack of blood flow to

the brain

Crippling

www.med.umich.edu/1libr/ aha/aha_stroke_art.htm

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References

References

Campbell, N and Reece, J. 1999. Essential

Biology 5th ed. Toronto, Canada.