Top answers

Biology
GCSE

Why is the heart known as a double pump?

The heart is known as a double pump becasue each half pumps blood around a different circulation system. The right side pumps blood to the lungs, while the left side pumps blood around the body.

DH
Answered by David H. Biology tutor
60412 Views

What is coronary heart disease?

Coronary heart disease is an incredibly common disease.  

It involves the coronary arteries: the arteries which provide oxygenated blood to the heart tissue itself to keep it functioning....

SJ
Answered by Simon J. Biology tutor
6393 Views

What is a myocardial infarction?

To answer this we can start by breaking down the phrase itself.

So, 'myo' always means muscle. 'Cardial' means of the heart. So myocardial infarction means infarction of the heart muscle....

SJ
Answered by Simon J. Biology tutor
6336 Views

Name two structural differences between arteries and veins.

  1. Arteries have thick, elastic, muscular walls whereas veins have thin walls with few elastic fibres. Arteries need these properties to give them the strength and elasticity needed to cope with the hi...
JW
Answered by Jennifer W. Biology tutor
115636 Views

What is a carbohydrate?

A carbohydrate is a long molecule made up of lots of individual units called monosaccharides. These units are sugars, including glucose, fructose and lactose.

When two of these units are ...

NH
Answered by Natalie H. Biology tutor
4267 Views

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