4.3 The Heart (GCSE Biology)

The following is a GCSE Biology test covering '4.3 The Heart'

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Question 1

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Without blood flow, heart cells become damaged due to lack of:

The heart ensures a continual supply of:

The muscular wall of the heart is composed mainly of:

Deoxygenated blood from the body enters the heart via:

Coronary arteries supply blood directly to:

The pulmonary circulation carries blood:

Blood returning from the body into heart is:

The heart acts as:

Coronary artery narrowing can be treated surgically by:

Blood from the heart is carried around the body through:

Coronary arteries can often be blocked by:

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