The heart contains electrical "pacemaker" cells, which cause it to contract — producing a heartbeat. "Each cell has the ability to be the 'band leader' and [to] have everyone follow," Phillips said. In people with an irregular heartbeat, or atrial fibrillation, every cell tries to be t...
A woman’s heart typically beats faster than a man’s. The heart of an average man beats approximately 70 times a minute, whereas the average woman has a heart rate of 78 beats per minute.[2] Blood is actually a tissue. When the body is at rest, it takes only six seconds for the ...
a heart condition.somebody’s heart rate(=the number of times someone’s heart beats per minute)Your heart rate increases as you exercise.adjectiveshealthyEating oily fish can help maintain a healthy heart.a bad/weak heart(=an unhealthy heart)The effort proved too much for her weak heart. ...
Noteworthy upgrades over previous heart-chip models include the maturity of the cells that the team developed fromhuman induced pluripotent stem cells(hiPSCs), and its ability to beat much like a human heart – at around 60 beats per minute. ...
Under resting conditions, theheart ratedoes not change significantly with age. During each beat, however, the muscle fibres of the heart do not contract as rapidly in the old as in the young. This reduction in power, or rate of work, is due to the age-associated reduction in the activiti...
During exercise or intense emotion the human heart rate can increase to 200 beats per minute. Thus, in a life span of seventy-five years, with everyday stresses and emotions, a human heart may beat more than 3 billion times. The heart pumps approximately 100 milliliters per beat. In ...
That's Fast!The human heart beats about 72 times every minute. If youwere a hummingbird, your heart would beat 17 times faster!When it is flying, a hummingbird's heart beats about 1, 260 timesevery minute.In fact, the hummingbird does almost everything fast. It is a super bird! It...
Percent beating was defined by whether the cardioid beat once within the entirety of the recording. Beats per minute were calculated by counting the total number of beats in the video, dividing them by the length of the video in seconds, and multiplying by 60. The extent of contraction is ...
【The heart pumps the equivalent of 5,000 to 6,000 quarts of blood each day.】5. How many breaths do you average each day?【12-16 beats per minute is average so... 720-960 beats per hour, and then 17,280-23,040 per day】6. How many times does the average heart beat in a ...
heart and then pumped into the blood stream. It is the atria that draw the blood from the lungs and body, and the ventricles that pump it to the lungs and body. The output of each ventricle per beat is about 70 ml, or about 2 tablespoons. In a trained athlete this amount is about...