How much time require for blood circulation in whole body of human ?!
Question:
Huaman body related question
Answers:
Here is a simple answer - A person's blood volume is roughly 70ml/kg of body weight. A normal resting cardiac index (the amount of blood a heart pumps in a minute) is about 3 L/min/m2 of body surface area.
Time in minutes for blood volume to circulate once = (0.07 * wt in kg) / (3 * body surface area in m2)
Assuming an average sized person (70kg, 1.73m2), that would give you 0.94 minutes.
EDIT:
mtarsier. what the heck are you talking about? You're dividing random numbers into one another!
Other Answers:
almost 1 minute
Ventricular contraction propels blood into arteries under great pressure. Blood pressure is measured in mm of mercury; healthy young adults should have pressure of ventricular systole of 120mm, and 80 mm at ventricular diastole. Higher pressures (human 120/80 as compared to a 12/1 in lobsters) mean the volume of blood circulates faster (20 seconds in humans, 8 minutes in lobsters).
For a person at rest, it takes just about one minute. If you are more active, it will take less time. Exactly how long depends on several things: the rate at which your heart beats, how big your heart is, and, to a certain extent, how big you are as well.
A person's heart beats about 65 to 75 times a minutes. This is called the beat rate. With each beat, the heart pumps about 60 to 70 milliliters of blood. If you multiply the two values together, you find that the cardiovascular output is just about four to five liters per minute. Can you guess how much blood an individual has?
If you exercise, your heart rate increases, and it decreases when you rest. Your body has a remarkable way of knowing just how much blood should be flowing to properly distribute the nutrients it needs. The primary means of controlling cardiovascular output is by controlling the beat rate with hormones. One, called acetylcholine , acts to decrease beat rate, when you are resting or sleeping. Another, called norepinephrine, increases the rate at which your heart beats, when you are active or excited. The balance of these two hormones helps to keep the rate of your blood flow just right.
The heart beats or contracts 70 times per minute. The human heart will undergo over 3 billion contraction cycles during a normal lifetime.
Both sites claim that the human body contains approximately 6 quarts (or 5.6 liters) of blood. The PBS site goes on to offer several other interesting tidbits:
In one day, your blood travels nearly 12,000 miles.
Your heart beats around 35 million times per year.
Your heart pumps a million barrels of blood during the average lifetime -- enough to fill three supertankers.
Wow. That's a lot of mileage for six little quarts.
Source(s):
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookcircSYS.html
http://www.pa.msu.edu/~sciencet/ask_st/120193.html
http://ask.yahoo.com/ask/20000612.html
try to get your pulse rate in one full minute.lets say 80 beats per minute. there are 60 seconds in a minute so 60 divided by 80 beats = .75 seconds.
therefore your blood circulates in your body every .75 seconds
Answers: