The following diagram compares the structure of two main blood vessels in the body.
Identify blood vessel A.
[1]
State a reason for your answer in part i).
[1]
Blood vessel B has a very large lumen.
Identify blood vessel B.
[1]
State one reason for the presence of a large lumen in blood vessel B.
[1]
The flow of blood in veins is not assisted by the pressure generated by the beating of the heart.
List two structures that assist with the flow of blood in veins.
Systolic pressure is one of the measurements taken by a doctor to determine the blood pressure of a patient.
Define the term 'systolic pressure'.
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