the heart and blood vessels

which one of these feature does a Vein have?

• large Lumen

• Small lumen

• thick outer wall

• thick layer of muscles and elasticated fibres

Arteries carry blood under what?

• exercise conditions

• high pressure

• low pressure

• resting conditions

veins carry blood under what?

• high pressure

• high heart beat conditions

• low pressure

Capillaries have what feature?

• very small lumen

• large lumen

• thick walls

• thick layer of muscle

4, 5 and 8 are called what/

• superior vena cava, aortic valave, pulmonary artery

• superior vena cava, aorta and pulmonary vein

• inferior vena Cava, pulmonary artery and pulmonary vein

• right atrium, aorta, pulmonary vein

label 3?

• left atrium

• right ventricle

• right atrium

• left ventricle

label D ?

• artery

• capillaries

• vein

• venule

label A?

• capillaries

• artery

• vein

• arterioles

Thick outer wall Because of what?

• To minimise the diffusion distance for permeable materials.​

• They are big blood vessels

• to maintain low blood pressure

• the need to adjust their diameter to maintain high blood pressure

which one of these characteristics does a Vein have?

• think outer wall

• no valves

• valves

• small lumen