Circulation

What is a closed circuit

A closed circulatory system is a type of circulatory system where blood is always contained within a network of blood vessels (arteries, veins, and capillaries) and never directly contacts body tissues or organs.

what is a double circulation system

A double circulatory system is a type of blood circulation where blood passes through the heart twice for every complete circuit of the body. This means blood goes from the heart to the lungs, then back to the heart, and then to the rest of the body before returning to the heart again.

what is an advantage of a double circulatory system

Stops the deoxygenated blood and oxygenated mixing to create a mix of blood which overall has low oxygen levels . double circulatory means blood is separate so contains more oxygen so higher gradient so more oxygen to tissue

In human double circulatory system what are the 2 circuits

Pulmonary = goes to the lungs

systematic = goes to the body

How is a heart beat formed

cells called myocytes which make up the cardiac muscle receive an electrical impulse they contract together, causing a heartbeat

How do myocytes get the oxygen they need

Fed by numerous capillaries from two coronary arteries. These arise from the aorta as it leaves the heart. Blood returns via the coronary sinus, which drains directly into the right atrium.