14+ The Diagram Shown Represents The Human Heart And The Direction Of Blood Flow Is Indicated By Arrows Background. The blood then passes back into the heart from the body cavity. A structure that prevents the blackflow of blood into an atrium is indicated by letter.
Being a muscle which requires nutrients. The first sound (s1), which is produced during systole, and the second sound (s2). Many systemic veins also have valves to ensure that blood will only flow towards the heart.
Sometimes they become defective and blood leaks back in the opposite direction, causing distension of the veins.
Which sequence represents normal blood flow between the two sides of the heart. Blood flows from your left atrium into your left ventricle through the open mitral valve. Recall that venous blood returns from the systemic organs to the right atrium via the superior and inferior venae cavae. 13 the diagram shows a villus.