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Blood flow doesn't change direction. They always head for the same direction.
blood flow is called circulation
toward the heart if deoxegen
You see, the sarcomere fills with endoplasmic filter that permits blood flow throughout the body
the heart pumps the blood to different part of the body
the oxygen-rich blood coming from the lungs enters the left atrium moves in anticlockwise to be distributed in the body
Blood flow doesn't change direction. They always head for the same direction.
Valves control the flow of blood. Without them blood could flow backwards.--------------------------Yes, true. Valve would maintain one way traffic for blood right from the heart and to outside parts of the body and form outside to the heart.
The flow or blood
forward
The reason we have valves in our heart is to direct the flow of blood in one direction. This ensures that it is able to circulate through the body.
People used to think that blood could flow in any direction in the veins. William Harvey came up with evidence used to show that blood moved only in one direction through veins. He discovered that the valves in the veins permit blood to flow in one direction only. He said that blood circulates in only one direction through the body and returns to the heart.
human
Blood itself does not "know" anything: it is not conscious. The direction of blood flow is regulated by valves in blood vessels, and the blood moves because the heart pumps it around the body.
Veins.
Circulation of the blood
blood flow is called circulation