Jablonski argues , sweat glands evolved as body hair vanished , allowing optimal cooling of the enlarging hominid brain and an active lifestyle 贾布隆斯基说，人类体毛消失，汗腺同时进化，协助原始人类在大脑变大与生活方式变活跃之际，具备最理想的冷却系统。
The growth of the hair the mankind has hair of 5 million body about , on the amount as about the same as chimpanzee , but body hair of the mankind is finer than chimpanzee much 头发的生长人类大约有500万根体毛，数量上与黑猩猩差不多，但人类的体毛比黑猩猩细得多。
Body hair of the person presents 3 sort in the person ' s lifetime model : the fetal entire length that was not born has fine nap , this kind of nap begins to grow when fetal 12 week about 人的体毛在人的一生中呈现三种类型：未出生的胎儿全身长有纤细的绒毛，这种绒毛大约在胎儿12周时开始生长。
Both boys and girls will grow noticeably taller , and the skin begins to produce large amounts of oily substance called sebum . if a young person doesn t care about personal hygiene , his her skin pores may become blocked by the sebum , causing blackheads and pimples 无论男女，身高会显著增加；皮脂腺分泌旺盛，若不注重个人卫生，暗疮便会出现；汗腺分泌增加使体汗较多；而腋下和阴部会出现体毛。
According to pet fur characteristics , use of imported raw materials and natural essence made from vegetable oils , particularly adding natural silk protein , deep pet nutrition can be hair , timely repair of damaged hair , long hair so that the use of flexible compliance bright 根据宠物皮毛特点，选用进口原料及天然植物油精华配制而成，特别添加天然丝蛋白成份，能深层营养宠物体毛，及时修复受损皮毛，长期使用能令其毛质柔顺亮泽富有弹性。
He unbuttoned successively in reversed direction waistcoat , trousers , shirt and vest along the medial line of irregular incrispated black hair extending in triangular convergence from the pelvic basin over the circumference of the abdomen and umbilicular fossicle along the medial line of nodes to the intersection of the sixth pectoral vertebr aelig ; , thence produced both ways at right angles and terminating in circles described about two equidistant points , right and left , on the summits of the mammary prominences 然后又反过来自下而上地依次解开背心长裤衬衫和内衣纽扣。他那双手的轨迹从参差不卷缩起皱的黑色体毛的中心线也就是自骨盆底到下腹部肚脐眼周围那一簇簇体毛，又沿着节结的中心线进而延伸到第六胸脊椎的交叉点，从这里又向两侧丛生，构成直角形，在左右等距离的两个点，即环绕乳头顶端形成的三角形收敛图形的中心线穿行。
