Biology, 11.04.2021 20:00 mmmmm96061

The four statements below describe some of the events that occur during the flow of blood through the heart. By placing the numbers 1 to 4 in the boxes, indicate the correct sequence of these events, starting immediately after deoxygenated blood has entered the heart and ending as the blood is sent to the lungs. The right atrium contracts.

The semilunar valves open.

The right ventricle contracts.

The tricuspid valve closes.

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