The term abdominal hair refers to the hair that grows on the abdomen (belly) of humans and non-human mammals, in the region between the pubic area and the thorax (chest). The growth of abdominal hair follows the same pattern on nearly all mammals, vertically from the pubic area upwards and from the thorax downwards to the umbilicus (navel). The abdominal hair of non-human mammals is part of the pelage or fur. Young Girl Fixing her Hair, by Sophie Gengembre Anderson Hair is a filamentous outgrowth skin found only in mammals. ... The human abdomen The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ... Look up Belly in Wiktionary, the free dictionary Belly can refer to: The abdomen, the part of the body between the pelvis and the thorax. ... Orders Subclass Monotremata Monotremata Subclass Marsupialia Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Subclass Placentalia Xenarthra Dermoptera Desmostylia Scandentia Primates Rodentia Lagomorpha Insectivora Chiroptera Pholidota Carnivora Perissodactyla Artiodactyla Cetacea Afrosoricida Macroscelidea Tubulidentata Hyracoidea Proboscidea Sirenia The mammals are the class of vertebrate animals primarily characterized by the presence of mammary... ... Diagram of a tsetse fly, showing the head, thorax and abdomen The thorax is a division of an animals body that lies between the head and the abdomen. ... Chest of a human male The chest is a part of the anatomy of humans and various other animals. ... An umbilicus which appears as a depression in the abdomen is referred to as an innie. The umbilicus (commonly called a navel, or belly or tummy button), is essentially a scar caused at birth by the removal of the umbilical cord from a newborn baby. ... For the plant of this name, see Umbilicus rupestris. ... In mammals, pelage is the hair, fur, or wool that covers the animal. ... A dogs fur usually consists of longer, stiffer, guard hairs—which can be straight, wiry, or wavy, and of various lengths, hiding a soft, short-haired undercoat. ...

Human abdominal hair

Hair on Male Abdomen

Before puberty, the adominal region of both males and females is covered with very fine vellus hair. In response to rising levels of androgens (mainly testosterone) during and after puberty, the skin of the abdomen begins to produce terminal hair with a faster growth rate. This process affects primarily men and is developing during puberty corresponding to Tanner stage 5. Initially hair grows in vertical lines from the pubic area up and from the thorax down to the navel. Slang terms for these lines are “funny trail” or “treasure trail”. With growing age the hair may spread to the remainder of the abdomen. Although the development of abdominal hair normally begins during puberty it may also start later, between the age of 20 and 30. The growth continues subsequently. Puberty refers to the process of physical changes by which a childs body becomes an adult body capable of reproduction. ... Vellus hair is short, fine, peach fuzz body hair. ... Hormone is also the NATO reporting name for the Soviet/Russian Kamov Ka-25 military helicopter. ... Testosterone is a steroid hormone from the androgen group. ... Developed hair, which is generally longer, coarser, thicker, and darker than vellus hair. ... The Tanner stages (also known as the Tanner scale) are stages of physical development in children, adolescents and adults. ...

Even some women may develop a small line of hair from the pubic area up to the navel. According to the female sex image in many cultures this is often seen as undesirable and unattractive. An excessive abdominal hair on women following the male pattern can be referred to hirsutism. Hirsutism is defined as excessive and increased hair growth in women in locations where the occurrence of terminal hair normally is minimal or absent. ...

See also

• Hair
• Pubic hair
• Chest hair