A cafeteria is a system designed to allow people to purchase a meal. /6 (a) List five components of a cafeteria
system.
b) Explain how each of the five components contributes to the
system.

(c) List one factor that contributes to the system operating safely and one factor
that contributes to the system working efficiently.

d) Suggest how automation could be used to provide the same service.

Explanation is in the file

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the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.