Topic: Circulatory System Aim: Describe the structure and function of the 3 types of blood vessels....

Topic: Circulatory SystemAim: Describe the structure and

function of the 3 types of blood vessels.

Do Now: Fill in the word BICONCAVE into your Root Word Organizer

HW: Heart ISN

A

B

C

Platelets

Red blood cells

White blood cells

Review: Identify the part of blood being described.

1. Most numerous blood cell.2. Carries enzymes.3. Involved in blood clotting.4. Carries oxygen.5. Largest blood cell.6. Made up of 90% water.7. Involved in blood clotting.8. Protect the body against disease.9. Carries hormones.

Did you know…•The body of an adult contains

over 60,000 miles of blood vessels!

•An adult's heart pumps nearly 4000 gallons of blood each day!

•The average three-year-old has two pints of blood in their body. The average adult has at least five times more!

Arteries

Capillaries

Veins

http://www.youtube.com/watch?v=A-HfDPJ3R00

Arteries

Capillaries

Veins

ARTERIES

•Carry blood AWAY from heart

•Thicker walls

Branching arteries in the eye

ARTERIES

•Carry blood AWAY from heart

•Thicker walls

•Blood flows at faster rate

•High pressure

•Pulse

•Most arteries carry oxygenated blood

Arteries

Capillaries

Veins

VEINS

•Carry blood TO the heart

•Thinner walls

•Less pressure

•No pulse

VEINS

•Carry blood TO the heart

•Thinner walls

•Less pressure

•No pulse

•Valves: stop blood from flowing backwards

•Most veins carry deoxygenated blood

Arteries

Capillaries

Veins

CAPILLARIES

•Tiny blood vessels

•Connect arteries to veins

•Very thin walls

Artery Vein

ARTERIES

CAPILLARIES

VEINS

Blood vessels in the right arm and shoulder

Arteries of the lower leg & blood supply to the face & skull

What would happen if the artery that transports oxygenated blood to the heart gets blocked?

What would happen if the artery that transports oxygenated blood to the brain gets blocked?

Let’s summarize…

1. Identify the three types of blood vessels.

2. Why are arteries very muscular?

3. Identify where each type of blood vessel carries blood?

4. Why are capillaries so thin?

5. Why do veins have valves?

6. In which blood vessel is your pulse felt? Explain why.

Review: Identify the type of blood vessel being described.

1. Low blood pressure

2. Where diffusion of substances occurs.

3. Contains valves

4. Carry blood away from the heart

5. Connects arteries and veins

6. Carry blood away from the heart

7. Red blood cells move in single file

8. Elastic and flexible.

9. Used to feel pulse.