© 2006 plano isd, plano, tx blood vessels. © 2006 plano isd, plano, tx the largest artery in the...

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© 2006 Plano ISD, Plano, TX Blood Vessels

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Page 1: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX Blood Vessels

Page 2: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

The largest artery in the body, the aorta, is almost the diameter ofThe largest artery in the body, the aorta, is almost the diameter of

a. a drinking strawa. a drinking straw

b. a computer cable

c. your big toec. your big toe

d. a garden hose

Page 3: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

If all your blood vessels were laid end-to-end, they would extend for about

If all your blood vessels were laid end-to-end, they would extend for abouta. 60,000 milesa. 60,000 miles

b. 6,000 miles

c. 60 milesc. 60 miles

d. between 1-6 miles

Page 4: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Components of the Circulatory SystemComponents of the Circulatory System

bloodblood connective tissue made of plasma and cells

heartheart muscular pump to move blood

blood vesselsblood vessels

veins, arteries, capillaries that deliver blood to all parts of body

Page 5: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Blood VesselsBlood Vessels

arteriesarteries veinsveinscarry oxygen-

rich blood from heart to

body

carry blood from organs

and tissues to heart

capillaries

capillariesmicroscopic blood vessels located

between arterioles and venules

Page 6: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Page 7: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

carry blood AWAY from the heart

smallest arteries are called arterioles

have thick, strong elastic walls

ArteriesArteries

Page 8: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Arteries carry oxygen-rich blood throughout the body.

Page 9: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

have thin, elastic walls with valves valves help veins return blood to the heart

carry blood TO the heart

VeinsVeins

smallest veins are venules

Page 10: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Veins carry oxygen-poor blood back to the heart.

Page 11: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

connect arteries and veins

walls of capillaries are one cell layer thick

surround every cell in the body

CapillariesCapillaries

site of gas exchange

Page 12: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Gas ExchangeGas Exchange

Page 13: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

tissue alveoli

O2

O2

O2

O2

O2

O 2

O2

O2

CO2

CO 2

CO 2

capillary

CO2

O2

Gas exchange

occurs between the thin

walls of the alveoli and

the thin walls of the capillaries.

CO2

CO 2

CO2CO2CO

2CO2CO

2

CO2

CO2

O2O2O

2

O2

O2O2O2

O2

O2

O2

Page 14: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Most are capillaries!

Every pound of the human body has more than a mile of blood vessels!

Page 15: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

all work together to bring oxygen to and remove carbon dioxide from the cells.

Blood vessels, Blood vessels,

heart,heart, lungslungs

Page 16: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Page 17: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Identify.Identify.

1.

2.

3.

4.

5.1. vein

2. venule

4. artery

5. arteriole

3. capillaries

Page 18: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Identify.Identify.

1.

2.

3.

4.

5.

Page 19: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

Page 20: © 2006 Plano ISD, Plano, TX Blood Vessels. © 2006 Plano ISD, Plano, TX The largest artery in the body, the aorta, is almost the diameter of a. a drinking

© 2006 Plano ISD, Plano, TX

How does the structure of capillaries help them function efficiently in CO2/O2 exchange?