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The vicuña (Lama vicugna) or vicuna [3] (both / v ɪ ˈ k uː n j ə /, very rarely spelled vicugna, its former genus name) [4] [5] is one of the two wild South American camelids, which live in the high alpine areas of the Andes; the other camelid is the guanaco, which lives at lower elevations.
The following is a list of hormones found in Humans. Spelling is not uniform for many hormones. For example, current North American and international usage uses [citation needed] estrogen and gonadotropin, while British usage retains the Greek digraph in oestrogen and favours the earlier spelling gonadotrophin.
Guanacos stand between 1.0 and 1.3 m (3 ft 3 in and 4 ft 3 in) at the shoulder, body length of 2.1 to 2.2 m (6 ft 11 in to 7 ft 3 in), [5] [6] [7] and weigh 90 to 140 kg (200 to 310 lb). [8] Their color varies very little (unlike the domestic llama ), ranging from a light brown to dark cinnamon and shading to white underneath.
As in other mammals, human thermoregulation is an important aspect of homeostasis. In thermoregulation, body heat is generated mostly in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles. [1] Humans have been able to adapt to a great diversity of climates, including hot humid and hot arid.
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 31 January 2025. List of organ systems in the human body Part of a series of lists about Human anatomy General Features Regions Variations Movements Systems Structures Arteries Bones Eponymous Foramina Glands endocrine exocrine Lymphatic vessels Nerves Organs Systems Veins Muscles Abductors Adductors ...
Some allow themselves to become dehydrated instead, preventing the formation of ice crystals within their body. [12] Insects can fly and kite at very high altitude. Flies are common in the Himalayas up to 6,300 m (20,700 ft). [13] Bumble bees were discovered on Mount Everest at more than 5,600 m (18,400 ft) above sea level. [14]
This article contains a list of organs in the human body. It is widely believed that there are 79 organs (this number goes up if you count each bone and muscle as an organ on their own, which is becoming a more common practice [1] [2]); however, there is no universal standard definition of what constitutes an organ, and some tissue groups' status as one is debated. [3]