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AQA GCSE PE - Circulatory System

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Garry Fell

on 16 September 2013

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Transcript of AQA GCSE PE - Circulatory System

GCSE PE
The difference between aerobic and anaerobic exercise
Lesson 3 - the circulatory system
Pulmonary artery
Pulmonary vein
TOP LOOP
BOTTOM LOOP
Aorta
Vena Cava
1. Blood leaves the right side of the heart via the pulmonary artery and goes to the lungs where it is oxygenated.
2. It then travels back to the left side of the heart via the pulmonary vein.
3.The left side of the heart then pumps the oxygenated blood around the rest of the body for use, via the aorta.
4. Once the oxygen has been used, the blood becomes deoxygenated and returns to the right side of the heart via the vena cava
Learning Objectives:
You will:
Learn what the circulatory system consists of;
Understand the main components and functions of the circulatory system.

Functions of the circulatory system
Transport

by carrying blood, working together with the respiratory system this achieves the following:
Blood carries O2, water and nutrients throughout the body and transports and removes the waste.
Protection:
is provided when antibodies that fight infection are carried in the blood.
Blood can clot to seal cuts and wounds.
Body temperature is regulated
as the blood absorbs body heat and carries it to the lungs and skin where it can be released.
The Heart
The heart rate increases with exercise as the heart is called upon to supply more O2 to the working muscles
The heart is a very efficient pump
Every time this happens it is called a
heartbeat
It contracts and relaxes like any other muscle
Adults have an average of 72 heartbeats per minute at rest
This is called
heart rate
TASK
Produce a practical walk through of the circulatory system using the key words and the resources provided.
Blood Vessels
Arteries
These have thick walls and carry oxygenated blood at high pressure away from the heart.
They do not have valves and the walls are quite elastic. You can locate your pulse in arteries.
Veins
These carry the deoxygenated blood back to the heart.
These have thinner walls than arteries and are less elastic.
they also have valves to make sure that the blood doesn't flow backwards.
Capillaries
These are microscopic vessels that link arteries to veins.
They are very thin, so to allow oxygen and carbon dioxide to pass through the walls.
Full transcript