The Circulatory The Circulatory SystemSystem

Homework: Research and make half a page notes: how blood carries oxygen, how it transport glucose/food, and how blood helps fight against diseases . Due Due by by Monday!!Monday!!

Recap of last lessonRecap of last lesson

In your books answer the following In your books answer the following questions:questions:

1.1. Name three muscles that are working Name three muscles that are working when throwing a cricket ball.when throwing a cricket ball.

2.2. Name the three types of muscles working Name the three types of muscles working in your body.in your body.

3.3. Define the term prime movers/agonists.Define the term prime movers/agonists.

4.4. The o____ is where the muscle joins the The o____ is where the muscle joins the stationary bone, e.g. the bicep is attached stationary bone, e.g. the bicep is attached to the s_______.to the s_______.

What are you going to learn?

• The functions of the heart• The movement of blood through the heart• How the heart works• The path of the circulatory system

Function of the heartFunction of the heart• The heart works for

24 hrs a day• It carries food &

oxygen to your body cells

• Carries carbon dioxide & other waste products away

1.Deoxygenated blood at the heart

2.Blood travels to the lungs via the pulmonary artery

3.Gaseous exchange occurs in the lungs

4._______ travels back to the heart via the pulmonary vein

5.The left ventricle pumps the _______ blood to the body cells

6.Gaseous exchange occurs in the body cells

7._________ blood returns to the heart (the cycle then repeats itself).

septumhttp://www.bbc.co.uk/schools/gcsebitesize/biology/

humansasorganisms/1circulationrev2.shtml

• It is the number It is the number of times your of times your heart beats per heart beats per minuteminute

• The intensity The intensity and duration of and duration of activity effects activity effects your heart rate.your heart rate.

Radial Pulse

Carotid Pulse

Heart RateHeart Rate

Task: Choose one of the Task: Choose one of the locations to take your locations to take your pulse, and count how pulse, and count how many times it beats in 30 many times it beats in 30 seconds.seconds.

TasksTasks• Go onto the BBC Go onto the BBC

bitesize website and bitesize website and write in your own write in your own words the definition of words the definition of stroke volumestroke volume, , cardiac cardiac outputoutput, , Maximum Maximum Heart RateHeart Rate, and how , and how they are all they are all calculated.calculated.

• Define Define adrenaline.adrenaline.

The difference between arteries and The difference between arteries and veinsveins

VEINS ARTERIESHave valves

Go away from the heart

Rarely pulsate Pulsate

Blood flows under low pressure

Have thick muscle and elastic tissue

Mainly carry deoxygenated blood

Temperature Control• Exercise causes your body to heat up

above its normal 37 degrees Celsius. To help cool you down your body sweats.

Red blood cells

Oxygen is carried in the haemoglobin, which gives these cell its red colour.

Red blood cells are produced in red bone marrow.

Plasma

Is watery and makes up about 55% of our blood.

Carries nutrients from food, waste from body cells and hormones.

White cells

This is the bodys self defence (immune) system against diseases.

They produce antibodies to destroy bacteria.