How many times blood goes through the heart during one cycle of fish /why?
Answers
Answer:
By “each cycle,” do you mean one heartbeat? Only 1/2 of the heart—one atrium and the ventricle on the same side. Any given blood cell will not arrive back at the heart to pass through its other half until several beats later.
If a blood cell has just departed from the left ventricle, for example, it will arrive back at the right side of the heart about 1 minute later, on average (sooner for blood traveling short distances, such as from the heart to the thyroid gland and back; later for blood traveling long distances, such as to the foot and back). In that one minute, in an average person at rest, the heart will beat about 70 times (70 cardiac cycles).
It’s inconceivable for any blood cell to pass through all chambers of the heart even once in a single cardiac cycle.
Explanation:
t goes only one time because first the deoxygenated blood goes into atrium and then into the ventricle (fish's heart has only two chambers) and gets pumped towards the gills. There the blood gets oxygenated and is pumped to all body parts.