Question

Which of the following has the largest heart?
A) Giraffe
B) Lion
C) Crocodile
D) None of the above

Answer 1

Hint: They are mostly found in the open woodlands of East Africa. These animals have long legs which helps them to run as fast as 35 miles per hour. They possess gregarious behaviour that allows for increased vigilance against the predators.

Complete Answer:
- From the above-mentioned animals, Giraffe has the largest heart because of the reason that they have great height so that they can easily generate double blood pressure.
- Giraffes have a heart rate of 150 beats per minute. On the other hand, the heart rate of the lion is between 42 to 76 beats per minute and the crocodile's heart rate is about 9.8 beats per minute.

Thus, the correct answer is option A i.e., Giraffe.

Additional information:
- Giraffe’s heart is 2 feet long and the weight of the heart is 24 pounds on an average. The blood pressure of giraffes is mainly high which ranges between 280/180 mm Hg.
- Giraffes have a long neck and the muscles in the heart increases by another 0.2 inches. Since these animals are very tall, there is a very difficult situation for them to pump blood from the heart to the brain.
- So, they use a series of valves which force the blood into the brain. Like the cow, giraffes have four stomach chambers.

Note: Giraffe has a heart which is 2 feet long due to their tall body. Heart beats with a rate of 150 beats per minute. Lions and crocodiles have a relatively smaller heart than the giraffes. Foramen of Panizza found in only crocodiles. When the animal is submerged in water, foramen of Panizza allows blood to bypass the lungs.