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Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration. The bruise then remains visible until the blood is either absorbed by tissues or cleared by immune system action. Bruises which do not blanch under pressure can involve capillaries at the level of skin, subcutaneous tissue, muscle, or bone ...
But to first make clear what a bruise is: It’s the result of a broken blood vessel (a.k.a. capillary) which causes a leakage and collection of blood under the skin’s surface, explains Riza ...
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]
Incision — A cut into a body tissue or organ, such as by a scalpel, made during surgery. Puncture Wound — Caused by an object that penetrated the skin and underlying layers, such as a nail, needle or knife. Contusion — Also known as a bruise, this is a blunt trauma damaging tissue under the surface of the skin.
A contusion is the discoloration of the skin, which results from underlying muscle fibers and connective tissue being crushed. This can happen in a variety of ways such as a direct blow to the skin, or a fall taken against a hard surface. The discoloration in the skin is present when blood begins to pool around the injury.
Classical-like EDS is characterized by skin hyperextensibility with velvety skin texture and absence of atrophic scarring, generalized joint hypermobility with or without recurrent dislocations (most often shoulder and ankle), and easily bruised skin or spontaneous ecchymoses (discolorations of the skin resulting from bleeding underneath). [5]
[1] [2] ITP often results in an increased risk of bleeding from mucosal surfaces (such as the nose or gums) or the skin (causing purpura and bruises). [1] Depending on which age group is affected, ITP causes two distinct clinical syndromes: an acute form observed in children and a chronic form in adults.
An abrasion is a partial thickness wound caused by damage to the skin. [1] It can be superficial involving only the epidermis to deep, involving the deep dermis. Abrasions usually involve minimal bleeding. [ 2 ]