";s:4:"text";s:3187:" P1: PBU CUNY666B-12 CUNY666A/Aird 0 521 85376 1 December 15, 2006 13:23 GIRAFFE CARDIOVASCULAR ADAPTATIONS TO GRAVITY 95 Figure 12.1. As another result of the long neck, a giraffe's blood has a long journey to travel. There’s no taller animal on Earth than the giraffe: A full-grown male, or bull, may stand 18 feet above the ground. Circulatory System With giraffes having such long necks, their heart has to work its very best to pump blood up the neck to the brain. The usual heart rate of a giraffe is 50 beats per minute, which is high for its size. The giraffe’s heart is located 2.5-3 meters away from it’s head. Its heart, …
Their long necks also provide a height advantage for spotting predators, so other grassland prey species look to giraffes as sentinels for danger. Instead, the giraffe has a relatively small heart and its power comes from a very strong beat as a result of the incredibly thick walls of the left ventricle. To keep blood flow to the brain, the heart of giraffe has to generate twice as much blood pressure as for average large mammal. Hence, it makes sense that the heart has to have certain morphological adaptations to strongly pump the blood with high pressures and deliver adequate blood flow to extremities. The circulatory system of the giraffe has several adaptations for its great height.
A giraffe has about 1.8 meters (6 feet) long legs. The heart of this animal is about 61 cms (2 ft) long and weighs up to 10 Kgs (22 lbs). How Long Are Giraffes Legs. A giraffe herd can consist of anywhere from 2 to 50 animals.A large male giraffe can eat as much as 100 pounds of food a day.One theory as to why a giraffes tongue is black or blue is to prevent it from being sunburned.Giraffes are not territorial.A giraffes heart can beat up to 75 litres of blood around the body every minute. For that reason, the anatomy of a giraffe is quite amazing. A number of other anatomical and physiological adaptations help make their long necks possible.
The blood pressure of a giraffe is approximately double to that of humans, which is necessary for the maintenance of blood flow to the brain. These animals are generally silent; however, they frequently emit moo sound when in distress.
The origins of giraffe’s imposing stature and associated cardiovascular adaptations are unknown.
The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones, and its distinctive coat patterns. A giraffe's neck can be up to 6 feet long. This makes their blood pressure double the amount of most mammals and makes their heart have to work that much faster. It is classified under the fam Starling pressures, which regulate transcapillary fluid balance. The right ventricle pumps the blood a short distance to the lungs, and the muscle is about 1 cm thick. The giraffe's stature can be a disadvantage as well—it is difficult and dangerous for a giraffe to drink at a water hole. One of the most powerful hearts of any mammal is the giraffes weighing around 24 pounds and measuring 2 feet long! Giraffe’s Adaptations : The Necessity . 17. ";s:7:"keyword";s:25:"giraffe heart adaptations";s:5:"links";s:760:"Mike Weinberg Height,
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