Download The heart by boardworks

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Management of acute coronary syndrome wikipedia , lookup

Electrocardiography wikipedia , lookup

Heart failure wikipedia , lookup

Coronary artery disease wikipedia , lookup

Quantium Medical Cardiac Output wikipedia , lookup

Rheumatic fever wikipedia , lookup

Antihypertensive drug wikipedia , lookup

Artificial heart valve wikipedia , lookup

Lutembacher's syndrome wikipedia , lookup

Congenital heart defect wikipedia , lookup

Heart arrhythmia wikipedia , lookup

Dextro-Transposition of the great arteries wikipedia , lookup

Transcript
Contents
The Heart
Structure of the heart
Valves in the heart
How the heart pumps blood
Summary quiz
1 of 49
© Boardworks Ltd 2004
The structure of the heart – exterior
The heart pumps blood around the circulatory system.
What is the heart made of?
muscle
tissue
The heart is made of muscle and keeps pumping blood
around your body, even when you are asleep!
What do the blood vessels on the outside of the heart do?
2 of 49
© Boardworks Ltd 2004
The heart needs blood too!
The heart is full of blood but also needs its own blood
supply so that the muscle can keep pumping.
muscle
tissue
blood vessels
supply blood
to muscle tissue
The blood vessels on the outside of the heart carry
oxygen-rich blood to the heart muscle cells.
Oxygen-poor blood is then carried away from these
cells by outer blood vessels and back into the heart.
3 of 49
© Boardworks Ltd 2004
The structure of the heart – interior
The inside of the heart is divided into two sections to keep
oxygen-rich and oxygen-poor blood separate.
Each side of the heart is also divided into two sections.
right side
of the heart
left side
of the heart
Each section of the heart is called a chamber.
How many chambers are there?
4
4 of 49
© Boardworks Ltd 2004
The chambers of the heart
The four chambers of the heart have special names:
An upper chamber is called an atrium (plural atria).
right
atrium
left
atrium
right
ventricle
left
ventricle
A lower chamber is called a ventricle.
5 of 49
© Boardworks Ltd 2004
What do atria and ventricles do?
The chambers of the heart have different functions.
blood to
the lungs
blood from
the body
blood to
the body
blood from
the lungs
The atria collect blood that enters the heart.
The ventricles pump blood out of the heart.
6 of 49
© Boardworks Ltd 2004
Inside the heart – labels
7 of 49
© Boardworks Ltd 2004
Inside the heart – labelling activity
8 of 49
© Boardworks Ltd 2004
Chambers of the heart – activity
9 of 49
© Boardworks Ltd 2004
Contents
The Heart
Structure of the heart
Valves in the heart
How the heart pumps blood
Summary quiz
10 of 49
© Boardworks Ltd 2004
Preventing backflow
Blood always flows in the same direction as it moves
through the heart during each circulation of the body.
Why is it important that blood does not flow backwards?
11 of 49
© Boardworks Ltd 2004
Heart valves
The chambers of the heart are separated by valves
which prevent blood from flowing in the wrong direction.
valve leading
out of
right ventricle
valve between
right atrium and
right ventricle
valve leading
out of
left ventricle
valve between
left atrium and
left ventricle
There are valves between the atria and the ventricles…
…and there are valves leading out of the ventricles.
12 of 49
© Boardworks Ltd 2004
Naming the heart valves
13 of 49
© Boardworks Ltd 2004
Contents
The Heart and Circulatory System
The circulatory system
Structure of the heart
Valves in the heart
How the heart pumps blood
Summary quiz
14 of 49
© Boardworks Ltd 2004
How does the heart pump blood?
Imagine the force needed
to squeeze a tennis ball.
That’s how much force
the heart uses to pump
blood around the body!
How does the heart produce
enough force to keep doing
this 24 hours a day?
The heart can pump blood
because it is made of muscle.
Muscle tissue works by
contracting (squeezing)
and relaxing.
15 of 49
© Boardworks Ltd 2004
How does the heart pump blood?
All the parts of the heart on
either side, work together
in a repeated sequence.
The two atria contract and
relax; then the two ventricles
contract and relax.
This is how blood moves
through the heart and is
pumped to the lungs and
the body.
One complete sequence of
contraction and relaxation is
called a heartbeat.
16 of 49
© Boardworks Ltd 2004
Heartbeat animation
17 of 49
© Boardworks Ltd 2004
How many heartbeats?
If your heart beats at an average rate of 70 times
per minute, how many heartbeats are there…
…in one hour?
70 x 60 =
4, 200
…in one day?
4, 200 x 24 =
100, 800
…in one year?
100, 800 x 365 =
36, 792, 000
…in 70 years?
36, 792, 000 x 70 =
18 of 49
2, 575, 440, 000
© Boardworks Ltd 2004
The sequence of a heartbeat
19 of 49
© Boardworks Ltd 2004
Journey of blood around the body
20 of 49
© Boardworks Ltd 2004
Contents
The Heart and Circulatory System
The circulatory system
Structure of the heart
Valves in the heart
How the heart pumps blood
Summary quiz
21 of 49
© Boardworks Ltd 2004
Multiple-choice quiz
22 of 49
© Boardworks Ltd 2004