Question

Question of the day:
1) crocodiles are 4 chambered but we have heard crocodiles remain submerged for hours without breathing। So, how can this be possible for এ 4 chambered animal?

2) Does increased breathing always means increased in heart beat?

3) What is the duration for i) Total Auricular diastole ii) Total ventricular diastole

Answer 1

Answer:

When you breathe in, your heart rate increases. When you exhale, it falls.

Atrial diastole: lasting about 0.7 seconds - relaxation of the atria, during which the atria fill with blood from the large veins (the vena cavae). Ventricular diastole: lasts about 0.5 seconds - begins before atrial systole, allowing the ventricles to fill passively with blood from the atria.

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Answer 2

Answer:

1) Like mammal and bird hearts, a crocodile’s heart is a muscle that pumps blood. One side of the heart sends blood that is full of oxygen out to most of the body. The other side pulls blood back toward the lungs to give it an oxygen refill.

But crocodile (and alligator) hearts have an extra valve that mammal and bird hearts don’t have. The extra valve is a flap that the animal can close in order to keep blood from flowing toward the lungs. This means that the blood goes right back into the body instead.

2) When you breathe in, your heart rate increases. When you exhale, it falls. This condition is benign. It's a naturally occurring heartbeat variation, and it doesn't mean you have a serious heart condition.

3) Atrial diastole: lasting about 0.7 seconds - relaxation of the atria, during which the atria fill with blood from the large veins (the vena cavae). Ventricular diastole: lasts about 0.5 seconds - begins before atrial systole, allowing the ventricles to fill passively with blood from the atria.

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