Page 145 - Knowledge Organiser Yr9 24-25

Knowledge Base: Science B2: Organisation in animals Year 9
9. Heart
9.1
What is the function of the heart?
To pump blood.
9.2
Why is the heart described as a double pump?
The right side of the heart pumps blood to the lungs and the left side of the heart pumps blood around the body.
9.3
Which blood vessel brings blood back from the body to the heart?
Vena cava.
9.4
Which chamber of the heart does blood enter on return from the body?
Right atrium.
9.5
Which blood vessel takes blood from the heart to the lungs?
Pulmonary artery.
9.6
Which chamber of the heart does blood leave from to go to the lungs?
Right ventricle.
9.7
Which blood vessel brings blood back from the lungs to the heart?
Pulmonary vein.
9.8
Which chamber of the heart does blood enter on return from the lungs?
Left atrium.
9.9
Which blood vessel takes blood from the heart to the body?
Aorta.
9.10
Which chamber of the heart does blood leave from to go to the body?
Left ventricle.
9.11
What is the function of valves in the heart?
To prevent the backflow of blood.
9.12
Where are the cells found that control the natural resting heart rate?
Right atrium.
9.13
What is an artificial pacemaker?
An electrical device used to correct irregularities in the heart rate.
9.14
What is stroke volume?
Volume of blood pumped out of the heart per beat.
9.15
How can you calculate cardiac output (blood flow) per minute?
Cardiac output per minute = heart rate in beats per minute x stroke volume per beat.
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