Here are a few interesting facts about Giraffes...
Just like humans, the Giraffe has seven neck vertebrae (although disputed by some zoologists who claim that it has eight), they are greatly elongated but other than that they are nearly identical structures.
A Giraffe's heart which weighs up to 10 kg (22 lb) and measures about 60 cm (2 ft) long, must generates approximately double the normal blood pressure for an average large mammal to maintain blood flow to the brain.
The Giraffe (Giraffa camelopardalis) is an African even toed ungulate mammal, the tallest of all land-living animal species, and the largest ruminant. The Giraffe is related to deer and cattle, but is placed in a separate family, the Giraffidae, consisting of only the Giraffe and its closest relative, the okapi. Its range extends from Chad in Central Africa to South Africa.
The average mass for an adult male Giraffe is 1,191 kilograms (2,630 lb) (weighing between 800 and 1,930 kilograms (1,800 and 4,300 lb)) while the average mass for an adult female is 828 kilograms (1,830 lb) (weighing between 550 and 1,180 kilograms (1,200 and 2,600 lb)).
Male Giraffes are up to 5.5 meters (18 ft) tall at the horn tips and female Giraffes are between 4 and 4.5 meters (13 and 15 ft) tall. The tallest Giraffe male recorded stood almost 6 meters (20 ft).
Both sexes have horns, although the horns of a female are smaller. The prominent horns are formed from ossified cartilage. The appearance of horns is a reliable method of identifying the sex of Giraffes, with the females displaying tufts of hair on the top of the horns, whereas males' horns tend to be bald on top, an effect of necking in combat. Males sometimes develop calcium deposits which form bumps on their skull as they age, which can give the appearance of up to three additional horns.
Giraffes also have slightly elongated forelegs, about 10% longer than their hind legs. The pace of the Giraffe is an amble, though when pursued it can run extremely fast, up to 55 km/h. It cannot sustain a lengthy chase.
The Giraffe has one of the shortest sleep requirements of any mammal, which is between ten minutes and two hours in a 24-hour period, averaging 1.9 hours per day.