Structure And Functions Of Skin Pdf
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- 5.1C: Structure of the Skin: Dermis
- Principles of dermatological practice
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The dermis consists of a papillary and a reticular layer that serve to protect and cushion the body from stress and strain. Lying underneath the epidermis—the most superficial layer of our skin—is the dermis sometimes called the corium.
5.1C: Structure of the Skin: Dermis
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Principles of dermatological practice
This diagram shows the layers found in skin. There are three main layers: the epidermis , dermis and hypodermis. There are also sweat glands, and hairs, which have sebaceous glands, and a smooth muscle called the arrector pili muscle, associated with them. Hairs are only found in thin skin, and not in the thick skin present on the fingertips, palms and soles of your feet. The epidermis : a thin outer portion, that is the keratinised stratified squamous epithelium of skin.
Wounding affects all the functions of the skin. The primary function of the skin is to act as a barrier. The skin provides protection from: mechanical impacts and pressure, variations in temperature, micro-organisms, radiation and chemicals. The skin regulates several aspects of physiology, including: body temperature via sweat and hair, and changes in peripheral circulation and fluid balance via sweat. It also acts as a reservoir for the synthesis of Vitamin D. The skin contains an extensive network of nerve cells that detect and relay changes in the environment. There are separate receptors for heat, cold, touch, and pain.
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other animal coverings , such as the arthropod exoskeleton , have different developmental origin , structure and chemical composition. The adjective cutaneous means "of the skin" from Latin cutis 'skin'. In mammals , the skin is an organ of the integumentary system made up of multiple layers of ectodermal tissue , and guards the underlying muscles , bones , ligaments and internal organs. Skin of a different nature exists in amphibians , reptiles , and birds. The skin interfaces with the environment and is the first line of defense from external factors.
c: Sweat pores fed by sweat glands open to the cristae cutis (arrows). 1. Structure and Function of the Skin. The skin is the human body's its largest organ, covering.
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Keep your skin healthy. The skin has six primary functions that help maintain its homeostasis. The skin consists of layers, each containing important elements that serve to protect the body against harm. Darker skin provides greater protection against the effects of sun exposure, skin cancer being the most common and most dangerous.
The skin is composed of two major layers: a superficial epidermis and a deeper dermis. The epidermis consists of several layers The topmost layer consists of dead cells that shed periodically and is progressively replaced by cells formed from the basal layer. The dermis connects the epidermis to the hypodermis, and provides strength and elasticity due to the presence of collagen and elastin fibers. The hypodermis, deep to the dermis of skin, is the connective tissue that connects the dermis to underlying structures; it also harbors adipose tissue for fat storage and protection. Although you may not typically think of the skin as an organ, it is in fact made of tissues that work together as a single structure to perform unique and critical functions.
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