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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]
The word skin originally only referred to dressed and tanned animal hide and the usual word for human skin was hide. Skin is a borrowing from Old Norse skinn "animal hide, fur", ultimately from the Proto-Indo-European root *sek-, meaning "to cut" (probably a reference to the fact that in those times animal hide was commonly cut off to be used as garment).
Sebaceous glands are part of the body's integumentary system and serve to protect the body against microorganisms. Sebaceous glands secrete acids that form the acid mantle . This is a thin, slightly acidic film on the surface of the skin that acts as a barrier to microbes that might penetrate the skin. [ 20 ]
The H&E staining procedure is the principal stain in histology [3] [7] [2] [5] in part because it can be done quickly, [7] is not expensive, and stains tissues in such a way that a considerable amount of microscopic anatomy [9] [10] is revealed, [7] [5] [4] and can be used to diagnose a wide range of histopathologic conditions. [8]
Keratin protein expression within the various layers and anatomic locations of the human integumentary system Keratin type Location of expression 1: Suprabasal epidermis of skin 2 (2e) Granular layer: 3: Cornea: 4: Suprabasal epidermis of mucosa 5: Basal layer: 6a: Suprabasal palmoplantar skin 6b: Basal palmoplantar skin Nail bed Hair follicle ...
The lymphatic system, or lymphoid system, is an organ system in vertebrates that is part of the immune system and complementary to the circulatory system. It consists of a large network of lymphatic vessels , lymph nodes , lymphoid organs, lymphatic tissue and lymph .
Aretha Louise Franklin (/ ə ˈ r iː θ ə / ə-REE-thə; March 25, 1942 – August 16, 2018) was an American singer, songwriter and pianist. [2] Honored as the "Queen of Soul", she was twice named by Rolling Stone magazine as the greatest singer of all time.