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2006-08-21 23:13:28 · 11 answers · asked by Pearly G 1 in Science & Mathematics Biology

11 answers

The average rate of heartbeat is 72 beats per minute. Thus each complete cardiac cycle takes 0:8 seconds. This is divided into systole and diastole as follows: -

Atria systole: 0:1 seconds

Atria diastole: 0:7 seconds

Ventricle systole: 0:3 seconds

Ventricle diastole: 0:5 seconds

Complete systole: 0:4 seconds

Complete diastole: 0:4 seconds

When heart rate increases, the period of complete diastole is shortened. This occurs during activity, inspiration and response to some drugs e.g. caffeine. Heart rate decreases during sleep, expiration and some drugs e.g. alcohol.

2006-08-21 23:26:36 · answer #1 · answered by ideaquest 7 · 1 0

1

2016-12-20 00:33:47 · answer #2 · answered by Anonymous · 0 0

At rest it beats 72 times per minute. But on physical exercise the beat per minute goes up.Depending upon how vigorous the exercise is and what is the age of the person, the rate may go up to 80% of the normal. The beat returns to normal after one has taken rest.

2006-08-21 23:53:55 · answer #3 · answered by nkmy83@yahoo.com 3 · 1 0

The heart's job is to move blood.

Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns to the heart, it follows a complicated pathway. If you were in the bloodstream, you would follow the steps below one by one

Oxygen-poor blood (shown in blue) flows from the body into the right atrium.

Blood flows through the right atrium into the right ventricle

The right ventricle pumps the blood to the lungs, where the blood releases waste gases and picks up oxygen.

The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium.

Blood flows through the left atrium into the left ventricle.

The left ventricle pumps the oxygen-rich blood to all parts of the body

Heart beats about 72 times per minute, 100,000 times in one day and about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times

2006-08-22 02:15:27 · answer #4 · answered by cookie 2 · 1 0

72

2014-08-17 11:34:28 · answer #5 · answered by Asif 1 · 0 0

it depends upon what is the person (assuming it is a human heart) doing, and what is his/her age. generally 70-80 beats per minute is normal for a human adult in resting position, but it can vary from 50 - 160 depending upon physical activity, age , sex , environment (temperature, level of oxygen in the air, etc.)

As a general rule older the person slower is the heart, (larger the animal slower is the heart)

2006-08-21 23:57:35 · answer #6 · answered by Librarian 4 · 1 0

stupidddddddddddddd check it keep your finger on your wrist then count the beats then note it in 1 minute normally it beats 72 times and if your nevcous then it will speed up accordingly

2006-08-22 02:37:04 · answer #7 · answered by TIMEPASS 3 · 0 0

when u are at rest ur heart rate will be normal ie 72 beats after u run or exercise it increases

2006-08-21 23:58:19 · answer #8 · answered by Anonymous · 0 0

I have been surfing online more than three hours today searching for answer to the same question, but I haven't found a more interesting discussion like this. It's pretty worth enough for me.

2016-08-23 04:59:30 · answer #9 · answered by lucrecia 4 · 0 0

because my heart beats one 92

2016-05-31 00:52:55 · answer #10 · answered by chinmay 1 · 0 0

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