GCSE Physical GCSE Physical EducationEducation

The Cardiovascular The Cardiovascular SystemSystem

THE HEARTTHE HEART

The HeartThe Heart

http://uk.youtube.com/watch?v=FKip-T7HwI4

The heart is divided into 2 parts. Each part is a pump, so the heart is a double pump.

The right sideright sidepumps

deoxygenated blood to the lungs to pick up oxygen.

The left sideleft sidepumps oxygenatedblood to the rest ofthe body for use.

Fromthe lungs

Fromthe body

Tothe lungs

Tothe body

How the Heart Pumps BloodHow the Heart Pumps Blood

1.1. Blood leaves the right side of the heart via the pulmonary artery and goes to the lungs where it is oxygenated.

2.2. It then travels back to the left side of the heart via the pulmonary

vein.

Pulmonaryartery Pulmonary

vein

Body

Heart

Lungs

Blood Flow around the Body - Blood Flow around the Body - Top Top LoopLoop

http://www.kscience.co.uk/animations/heart.swf

33.. The left side of the heart then pumps the oxygenated blood around the rest of the body for use, via the aorta.

44.. Once the oxygen has been used, the blood becomes deoxygenated and returns to the right side of the heart via the vena cava.

Vena Cava

Aorta

Blood Flow around the Body - Bottom Blood Flow around the Body - Bottom LoopLoop

Body

Heart

Lungs

http://www.kscience.co.uk/animations/blood_system.swf

Blood, heart & circulation\Circulatory system

Fill the gaps In pairsFill the gaps In pairs The heart is made of muscle and has four chambers, two

on each side. The left side contains _________ __ blood and the right side

contains _____ _______ blood. The left ventricle is __________ since it has to pump blood. Deoxygenated blood leaves the heart via the

_____________ . Blood returns to the heart via the __________. Blood is pumped away from the heart through_______. The blood picks up __________ at the lungs then it goes

straight to the ________. The left side of the heart pumps _____________ blood. The right side receives _______________ blood. Body cells need oxygen to stay alive. Oxygen is carried in the ____________ to our _____________.

The structure of the The structure of the HeartHeart

Pg 58Pg 58

The Structure of the The Structure of the HeartHeart

GENERAL DESCRIPTION OF GENERAL DESCRIPTION OF THE HEARTTHE HEART

MUSCULAR PUMPING ORGAN (ABOUT MUSCULAR PUMPING ORGAN (ABOUT THE SIZE OF YOUR FIST) SITUATED THE SIZE OF YOUR FIST) SITUATED UNDER THE LEFT BREAST, AND IS UNDER THE LEFT BREAST, AND IS RESPONSIBLE FOR PUMPING THE RESPONSIBLE FOR PUMPING THE BLOOD AROUND THE BODY. IT IS BLOOD AROUND THE BODY. IT IS DIVIDED INTO 4 CHAMBERS – ATRIUM DIVIDED INTO 4 CHAMBERS – ATRIUM AND VENTRICLESAND VENTRICLES

WHAT IS THE CARDIOVASCULAR WHAT IS THE CARDIOVASCULAR SYSTEM?SYSTEM?

HEART, BLOOD AND BLOOD VESSELS.HEART, BLOOD AND BLOOD VESSELS.

HANDOUT DIAGRAMS OF THE HANDOUT DIAGRAMS OF THE HEART AND ASK THEM TO HEART AND ASK THEM TO LABEL ALSO, PASS ROUND LABEL ALSO, PASS ROUND MODEL AND ASK THEM TO MODEL AND ASK THEM TO LISTEN TO THE HEART USING LISTEN TO THE HEART USING STETHOSCOPES.STETHOSCOPES.

TASK…….TASK…….

WRITE A DESCRIPTION OF THE WRITE A DESCRIPTION OF THE HEART AND THE WAY IT WORKS. IN HEART AND THE WAY IT WORKS. IN YOUR DESCRIPTION EXPLAIN WHY YOUR DESCRIPTION EXPLAIN WHY IT IS DIVIDED UP INTO 4 IT IS DIVIDED UP INTO 4 CHAMBERS AND EXPLAIN WHAT CHAMBERS AND EXPLAIN WHAT HAPPENS TO THE HAPPENS TO THE CARDIOVASCULAR SYSTEM DURING CARDIOVASCULAR SYSTEM DURING EXERCISE – P116ALSO, DEFINE EXERCISE – P116ALSO, DEFINE HEART RATE, CARDIAC OUTPUT HEART RATE, CARDIAC OUTPUT AND STROKE VOLUME P120AND STROKE VOLUME P120

ANSWERS…..ANSWERS…..

HEART RATE – BEATS/MINUTEHEART RATE – BEATS/MINUTE CARDIAC OUTPUT – STROKE CARDIAC OUTPUT – STROKE

VOLUME X HEART RATE.VOLUME X HEART RATE. STROKE VOLUME – AMOUNT OF STROKE VOLUME – AMOUNT OF

BLOOD PUMPED BY EACH BLOOD PUMPED BY EACH HEART BEAT 85ML UP TO 130 HEART BEAT 85ML UP TO 130 ML.ML.

HOMEWORK – WHAT ARE THE HOMEWORK – WHAT ARE THE IMMEDIATE PHYSIOLOGICAL IMMEDIATE PHYSIOLOGICAL EFFECTS OF EXERCISE ON THE EFFECTS OF EXERCISE ON THE BODY?-P118BODY?-P118

INCLUDE:INCLUDE: BREATHING BECOMES FASTER AND BREATHING BECOMES FASTER AND

DEEPERDEEPER BODY TEMP INCREASESBODY TEMP INCREASES SWEATINGSWEATING MUSCLES BEGIN TO ACHEMUSCLES BEGIN TO ACHE LACTIC ACIDLACTIC ACID

HomeworkHomework

1.1. What is the difference between What is the difference between arteries, capillaries and veins?arteries, capillaries and veins?

In terms of thickness of vessel wall, In terms of thickness of vessel wall, internal lumen, presence or internal lumen, presence or absence of valves, blood pressure absence of valves, blood pressure and direction of blood flow.and direction of blood flow.

Use diagrams and detailed notes to Use diagrams and detailed notes to aid your answer!aid your answer!