YouTube video-Bill Nye Circulation

Ch. 3Lesson 1

What is the circulatory

system?

Pulse Activity

• Question-How does activity affect your pulse? • Purpose: To determine how different activities

cause the pulse to change• Hypothesis: I think that some activities will

make your pulse go fast and some activities will make your pulse go slow.

• Materials: stop watch, index and middle fingers, wrist

• Procedure: 1. Find resting pulse rate. 2. Record observations in data chart. 3. Walk in place for 30 seconds. 4. Find pulse rate. 5. Record observations in data chart. 6. Jog in place for 30 seconds. 7. Record observations in data chart. 8. Sit for 30 seconds. 9. Find pulse rate. 10. Record observations

• Conclusion: When you do energetic activities, your pulse rate goes higher. When you are at rest, your pulse rate is lower.

Data Chart

Pulse Rate Activity

14 x 4= 56 Resting

After walking

After jogging

After resting

circulatory system• heart, blood & blood vessels• body’s transportation system • moves food & oxygen to each cell

• takes away cell’s wastes

44 partsparts

of bloodof blood

plasmared

blood cells

white blood cells

platelets

plasmaplasma• liquid part of bloodliquid part of blood

• carries food from digestive systemcarries food from digestive system

• moves chemicals (eg. adrenaline)moves chemicals (eg. adrenaline)

Is our blood Is our blood blue inside blue inside our body?our body?

• Because it lacks oxygen, the waste-rich blood that flows through the veins has a deep red color, almost like maroon.

• Because the walls of the veins are rather thin, the waste-rich blood is visible through the skin on some parts of the body.

• Look at your wrist or hands you can probably see your veins carrying your blood back to your heart.

• Your skin refracts light, though, so that deep red color actually appears a little blue from outside the skin.

Types of blood cellsRed

blood cells

PlateletsPlatelets White White blood blood cellscells

Form shaped like discs w/

dimple on each side

not complete

cells

different shapes &

sizes

Function carry oxygen

form sticky blood clots

protect body from germs

Disorder sickle cell anemia

embolism leukemia

RED BLOOD CELLS

•Bright red when carrying oxygen

•Darker red when give oxygen to cells

white white blood blood cellscells

•wrap around harmful germs

•make chemicals

•# always changing- more when need to fight infection

plateletsplatelets

• Pieces of blood cells that float in blood

• Clump together to form sticky clots

Video-Magic School Bus Blood Cells

sickle cell anemia

Video-What is sickle cell anemia?

ArteriesArteries, Capillaries & Veins

3 kinds of 3 kinds of blood vesselsblood vessels

1. 1. AArteriesrteries• carry blood carry blood AAway way

from heartfrom heart

2. veins2. veins• carry blood from carry blood from

cells to heartcells to heart

3. 3. ccapillariesapillaries• CConnect onnect

arteries & veinsarteries & veins

• smallest blood smallest blood vesselsvessels

• gas exchange gas exchange (CO(CO2 2 & O)& O)

They are so thin that blood cells can only pass through them in single file.

Video-The Vessels of the Circulatory System

1. Blood containing wastes & CO2 flows from body right atrium.

2. Right atrium contracts, squeezes blood right ventricle.

3. Right ventricle contracts, pumping blood artery leading lungs.

4. Blood containing oxygen flows in veins from lungs left atrium.

5. Goes to the body thru. the left ventricle

Video-How the Heart Works

Blood’s Journey

through the Body

valves• flaps that keep blood flowing in 1 direction

Pathway of Circulation

YouTube video-Bill Nye Circulation

right atrium

right ventricle

left atrium

left ventricle

Guess the Covered Word

valvesvalves

Flaps that keep blood flowing in one

direction

arteriesarteries

Blood vessels that carry blood away

from the heart

plasmaplasma

Makes up more than half of blood

plateletsplatelets

Pieces of cells that float in the blood

capillariescapillaries

so thin that blood cells can only pass through

them in single file

sickle-cell sickle-cell anemiaanemia

Disease in which the red blood cells have a shape like a crescent

moon

red blood red blood cellscells

Shaped like discs with a dimple on each side

veinsveins

Blood vessels that carry blood from cells

back to the heart

plateletsplatelets

Clump together to form blood clots

white blood white blood cellscells

protect body from germs

circulatory circulatory systemsystem

Body’s transportation

system

plasmaplasma

Liquid part of blood

Write a story about how a blood cell travels through the body.

• Your story must include the following:

1. 3 types of blood vessels and their functions

2. 4 components of blood (red blood cells, white blood cells, platelets & plasma) and their forms and functions

3. The blood’s path through the body, including the chambers of the heart and the valves