"A giraffe's heart, which can weigh … For blood to reach the head, the heart must then beat strongly enough to overcome this significant downward pressure caused by gravity. Gravity is a giraffe’s biggest enemy. Source: The San Diego Zoo and NATURE’s Giraffe Resources, The Long-Lasting Impact of Wildfires on Wildlife, WWF Explains, Educate all people on how and why to protect giraffes, Support sustainable agriculture and settlement practices near giraffe habitats, Reforest key areas with acacia trees that provide giraffes’ main food source, Stop the poaching of giraffes for their tails, considered status symbols, Solve hunger in areas like Sudan where impoverished villagers eat giraffe meat, Reverse climate change that’s causing rising temperatures and widespread drought in Africa. Make a donation to support our work in Africa. However, this heart is incredibly large since it needs to be able to pump blood through the extremely long neck of a giraffe. Prof Mitchell says it will also be exciting to study the physiology of living giraffes using remote devices to collect data. A giraffe only has one heart.

This is the main reason why they can push the blood through their necks. Giraffes have special adaptations to help keep the flow of blood to their brains constant. Meanwhile, males are up to 18 feet tall and can weigh 3,000 pounds. Giraffes can be found throughout sub-Saharan Africa. Their neck alone can be 6 feet long, which is taller than the average man and can weigh up to 600 pounds. A giraffe's heart has evolved to have thick muscle walls and a small radius, giving it great power.The walls of the blood vessels also thicken with age as the giraffe's neck grows longer, to avoid rupturing under increasing pressure A giraffe’s eyes are the size of golf balls. Is the Coronavirus Crisis Increasing America's Drug Overdoses? The giraffe's heart measures about two feet and weighs approximately 25 pounds. Female giraffes are up to 14 feet tall and weigh up to 1,500 pounds. Ossicones start as cartilage and later fuse to the skull as the giraffe ages. The human heart weighs about 0.6 pounds (0.3 kilograms), but a giraffe's weighs about 26 pounds (12 kg), since the organ needs to be powerful enough to pump blood up the animal's long neck. “Giraffe have this huge problem of having a head that is 2 m away from the heart. So in a really big animal how does it get blood up there?” Prof. Graham Mitchell, Centre of Wildlife Studies in Onderstepoort, South Africa. Giraffes have got a way of adjusting the capacity of the cardiovascular system and are able to shrink and expand their blood vessels to change the volume of the cardiovascular system very efficiently.". We use MailerLite as our marketing automation platform. Some of your most frequently asked questions answered, Twiga Tracker – Using modern technology to save giraffe and their habitat, Environmental Education for Namibia’s future. Written by Michael Botes. The left ventricle of the giraffe’s heart has thick walls, so the beat of their heart is incredibly strong. For every 15 cm increase in the length of the neck the left ventricle wall adds another 0.5 cm thickness.

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