WebThe diagram shows a section through the heart. The main blood vessels are labelled A, B, C and D. Which blood vessel carries oxygenated blood away from the heart? (1) C - Aorta Which blood vessel carries deoxygenated blood to the heart? (1) A - vena cava Explain how the highest blood pressure is produced in the left ventricle. (1) WebThe first thing to look for are the four rooms of the heart. They match up with the two main arteries and veins we looked at, and are called atriums (top ones) and ventricles. Try putting your fingers through the arteries and veins to see if you can trace the path blood takes from the body, to the lungs, back from the lungs, and to the body.
The diagram shows the human heart and some of the blood …
WebThe heart structure The heart is labelled as if it was in the chest so what is your left on a diagram is actually the right-hand side (and vice versa) The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs where oxygen diffuses in from the alveoli and carbon dioxide diffuses out WebThe circulatory system (CCEA) Blood is pumped away from the heart at high pressure in arteries, and returns to the heart at low pressure in veins. The human circulatory system is a double... nephthys egyptian god of what
The circulatory system review (article) Khan Academy
WebThe heart is a unidirectional pump. Valves are present to prevent the backflow of blood. The right side pumps deoxygenated blood (low in oxygen and high in carbon dioxide) to the … WebA-level Biology – Controlling Heart Rate The right atrium wall is where specialised fibres called the sinoatrial node (SAN) is located. It is also known as the ‘pacemaker of the heart’ as it is what starts the wave of electrical stimulation. The process is described below: The sinoatrial node produces a wave of electrical stimulation. WebJun 8, 2024 · The heart is composed of three layers: the epicardium, the myocardium, and the endocardium. The inner wall of the heart is lined by the endocardium. The myocardium consists of the heart muscle cells that make up the … nephthys egyptian goddess