Search results
Results from the WOW.Com Content Network
The skin is one of the largest organs of the body. In humans, it accounts for about 12 to 15 percent of total body weight and covers 1.5 to 2 m 2 of surface area. [1] 3D still showing human integumentary system. The skin (integument) is a composite organ, made up of at least two major layers of tissue: the epidermis and the dermis. [2]
Download QR code; Print/export ... The human skin is the outer covering of the body and is the largest organ of the integumentary system. ... 5.4E+10 97.1 11.5% ...
The term is derived from integumentum, which is Latin for "a covering". In a transferred, or figurative sense, it could mean a cloak or a disguise. [2] In English, "integument" is a fairly modern word, its origin having been traced back to the early seventeenth century; and refers to a material or layer with which anything is enclosed, clothed, or covered in the sense of "clad" or "coated", as ...
Exposure to light through windows is insufficient because glass almost completely blocks UVB light. [184] In skin, either permanently in dark skin or temporarily due to tanning, melanin is located in the stratum basale, where it blocks UVB light and thus inhibits vitamin D synthesis.
Free nerve endings can detect temperature, mechanical stimuli (touch, pressure, stretch) or danger (nociception). Thus, different free nerve endings work as thermoreceptors, cutaneous mechanoreceptors and nociceptors. In other words, they express polymodality.
The Pacinian corpuscle or Vater-Pacinian corpuscles or Lamellar corpuscles [5] in the skin and fascia detect rapid vibrations of about 200–300 Hz. [3] [6] They also produce transient responses, but have large receptive fields. Free nerve endings detect touch, pressure, stretching, as well as the tickle and itch sensations. Itch sensations are ...
The basement membrane, also known as base membrane, is a thin, pliable sheet-like type of extracellular matrix that provides cell and tissue support and acts as a platform for complex signalling. [ 1 ] [ 2 ] The basement membrane sits between epithelial tissues including mesothelium and endothelium , and the underlying connective tissue.
Cutaneous receptors are at the ends of afferent neurons. works within the capsule. Ion channels are situated near these networks. In sensory transduction, the afferent nerves transmit through a series of synapses in the central nervous system, first in the spinal cord, the ventrobasal portion of the thalamus, and then on to the somatosensory cortex.