Skin hair and nails structure and function pdf merge

The function of the cuticle is to protect the matrix from infection. Skin structure and function george rogers learning objectives this topic should provide you with. The function of the nail bed is to supply nourishment and protection. Structure and function of skin, hair and nails joey e laicheong john a mcgrath abstract the skin is the largest organ of the human body. Jan 11, 2018 ringworm is caused by a fungus that eats keratin, a protein found in skin, hair, and nails. The layers are packed very closely together with fat. The hair and nail are skin appendages that share with the skin a common origin from the ectoderma layer. The outer layer is called the epidermis, whose main function is that of providing protection for the body. Through essential vitamins, minerals, and natural, plantbased nutrients, hair skin nails supports your bodys own. Most of this hair is fine and downy, but the hair on the head includes stronger. Keratin is a large molecule made up of smaller units called amino acids, which join together to form a chain. Oct 09, 2014 clare hargreavesnorris hair shaft the hair shaft is the portion of the hair that lies above the skins surface.

The structure and function of skin, third edition is devoted to all matters pertaining to the structure and function of the skin. This is the collective name given to the nail walls and the cuticle area. The integumentary system consists of the skin, hair, nails, the subcutaneous tissue below the skin, and assorted glands. Download citation structure and function of skin, hair and nails the skin is the largest organ of the human body. Skin is a waterproof, flexible, but tough protective covering for your body. The hair shaft is made mostly of dead, keratin filled cells.

Skin, hair, and nail assessment skin hair and nail. Basic science structure and function of a rete ridges melanocytes hair follicle skin, hair and nails b dermal blood vessels joey e laicheong john a mcgrath abstract the skin is the largest organ of the human body. Skin is the major barrier between the inside and outside of your body. This chapter discusses the structure, histology, and function of the skin. The skin is the largest organ of the human body, weighing approximately 16% of our bodyweight. Pdf structure and function of skin, hair and nails. The sweat released by eccrine sweat glands is mostly water. Normally the surface is smooth, punctuated only with hair and pores for sweat. These cells work defensively to prevent damage to the hairs inner structure and to control water content of hair fiber. Function of skin, hair and nails skin provides a physical barrier against the external environment and helps to reduce water loss by means of the waterimpermeable stratum corneum.

Keratinocytes basal cells make up the majority of cells in the epidermis. Hair, nails, and glands are structures of epidermal origin, even though some parts of hair and glands are largely in the dermis. The function of the nail wall is to protect the nail plate edges. Clare hargreavesnorris blood supply blood is supplied to the skin by small blood vessels known as blood capillaries. This is the portion of skin upon which the nail plate rests. It is the visible part that you see such as the eyebrows, eyelashes, body hair and the hair on the head. This includes the production of collagen and keratin, two critical forms of protein.

Pdf structure and function of skin, hair and nails joey lai. Dna structure the electrons in dna absorb uv radiation and converts it to heat. Structure and function of the skin msd manual consumer version. Structure and functions of the skin see online here the skin forms part of the bodys integumentary system. Basic histological structure and functions of facial skin. The middle structure includes the cortex which provides strength, color and texture of the hair. It is the tough protein keratin that forms the strength of your hair, nails and the outer layer of skin. Manicure based on hand, nail and skin structure 7 years ago 0 acetone beautiful brush color crack cuticles diet dry egg yolk essential oil feet file fingers foot care french manicure hand hand care hands health healthy lemon juice lotion manicure massage nail care nail clippers nail polish nails pedicure peeling polish remover scrub shape skin. Three of the more fascinating components of the body are the skin, hair and nails. Appendages such as the sebaceous glands, sweat glands and hair follicles also exist within these layers, and they play various roles in the overall function of the skin. The skin is an organ that provides the outer protective wrapping for all the body parts. The skin cutis provides a waterproof and protective covering for the body, contains sensory nerve endings, and aids in the regulation of temperature. This important vitamin plays a role in nearly every metabolic function performed by the body including the proper balance of hormones.

Drawing upon the accumulated data derived from embryology, histology, anatomy, physiology, biochemistry, and pharmacology, this book presents an overview of skin, with emphasis on human skin. View chapter twelve skin, hair, and nails from nurs 309 at indiana state university. Clare hargreavesnorris hair shaft the hair shaft is the portion of the hair that lies above the skins surface. Jul 08, 2015 the function of the cuticle is to protect the matrix from infection. The sebaceous and sweat glands originating within the skin also have many vital functions. It has an area of 2 square metres 22 square feet in adults, and weighs about 5 kilograms. The skin is the bodys largest organ and weighs between 3 and 10 kg 820 pounds. Skin is very elastic and at the surface is a dead substance which is constantly being shed and replaced by new growth.

Each hair grows for several years and then the follicle enters a resting phase for several months. Earwax and the hair combine to provide a sticky barrier against. The stratum corneum also helps against the penetration of irritants and other. Peaks of hair replacement occur in the spring and autumn. Like the name says, its all about supporting the health, beauty, shine, and strength of your hair, skin, and nails by nourishing them from the inside out.

See how the skin is involved in the regulation of body temperature. Hair and nails hair is found on all body parts except the palms, soles, lips, nipples, and portions of the external reproductive organs. The cuticle is the hairs outer most layer which has shingle or scale like cells that overlap. A constantly changing, dynamic organ, there are three main skin layers the epidermis, the dermis and the subcutis each of which is made up of several sublayers. They are coiled glands that lie in the dermis, with the duct opening to a pore on the skin surface, where the sweat is released although some may open into hair follicles, like sebaceous glands. The epidermis is the relatively thin, tough, outer layer of the skin. The skin and its appendages that derive from the epidermis hair follicles, sweat glands, sebaceous glands, nails, and mammary glands establish the integumentary system. Very few of the bodys many parts renew themselves more quickly than the skin. The dermis is in the middle and fat forms the innermost layer.

View skin problems such as sun burn, skin cancer and acne. It corresponds to the claw, hoof, or talon of other vertebrates. The nail is a platelike, keratinous, translucent structure that consists of highly specialized epithelial. Histologically, skin has two main layersthe epidermis and the dermiswith a subcutaneous fascia called the hypodermis, which lies deep in the dermis. It is the superficial avascular layer of stratified squamous epithelium, it is ectodermal in origin and gives rise to the appendages of the skin, namely hair, nails, sweat glands and sebaceous glands. Hair and nails hair and nails are derived from the epidermis. Integumentary system anatomy and physiology nurseslabs. Skin, hair, and nails for parents nemours kidshealth.

It is a complex epithelial and mesenchymal tissue comprising a multilayered stratified epidermis, adnexal structures such as hair follicles, sweat glands and sebaceous glands, a dermis containing collagen and elastic fibres, and underlying subcutaneous fat. Silica also known as silicon, silica is a mineral thats found in a wide range of plantbased foods, including whole grains and. This is the visible part of the nail that sits on top of the nail bed. It has very rich supply of blood and lymph vessels to keep nail healthy. Get a printable copy pdf file of the complete article 116k, or click on a page image below to browse page by page. Structure and function of the skin skin disorders merck. Basic science structure and function of a rete ridges melanocytes hair follicle skin, hair and nails b dermal blood vessels joey e laicheong john a. Skin consists of multiple layers, epidermis, dermis and hypodermis. Structure and function of skin, hair and nails researchgate. The skin, hair and nails layers of skin common integument refers to skin and subcutaneous tissue, hair, nails, and breast. Chapter twelve skin, hair, and nails chapter twelve skin.

It is a complex epithelial and mesenchymal tissue comprising a multilayered strati. Jun 08, 2010 the skin is the largest organ of the human body, weighing approximately 16% of our bodyweight. Nail, in the anatomy of humans and other primates, horny plate that grows on the back of each finger and toe at its outer end. Most of the cells in the epidermis are keratinocytes.

The majority of hair follicles will be in this phase. These are the folds of the skin overlapping the sides of the nails. They fulfil important protective and cosmetic physiologic function. Manicure based on hand, nail and skin structure nail art. Learn vocabulary, terms, and more with flashcards, games, and other study tools. It is a protective covering for the skeletal system and vital organs. Hair follicles grow in repeated cycles in a mosaic pattern so that the whole hair coat isnt lost at one time. Silica also known as silicon, silica is a mineral thats found in a wide range of plantbased foods, including whole grains and vegetables like carrots and green beans. Request pdf structure and function of skin, hair and nails the skin is the largest organ of the human body. Structure and function of the skin, hair and nails the genes controlling epidermal function are. Hair is simple in structure, but has important functions in social functioning. Structure and function of skin, hair and nails medicine. The nail plate is composed of layers of keratinized skin cells.

As such, it creates a barrier between the body and the external environment and protects the body against excessive. Children under 15 are particularly susceptible to ringworm. It is a waterproof, airtight and flexible barrier between the environment and internal organs. The stratum corneum also helps against the penetration of irritants and other allergens that can cause skin inflammation, such as in dermatitis. More than disease entities involving the skin have been described and up to 20% of. The dermis is divided into a superficial papillary dermis and deeper reticular dermis. It performs many vital functions, including protection against external physical. Structure and function basic and clinical dermatology forslind, bo, lindberg, magnus on. Like hair and nails, they are derived from the epidermis. The skin and its derivatives sweat and oil glands, hair and nails serve a number of. Hair is made up of different layers and structures.

Ringworm is caused by a fungus that eats keratin, a protein found in skin, hair, and nails. The epidermis is composed of 4 layersthe stratums basale, spinosum, granulosum, and corneum. Hair follicles produce individual hairs which help protect and insulate the body. Structure and function of skin, hair and nails sciencedirect. Each hair grows for several years and then the follicle enters a. Beneath the surface of the skin are nerves, nerve endings, glands, hair follicles, and blood vessels. They originate from cells in the deepest layer of the epidermis called the basal layer. Chapter twelve skin, hair, and nails structure and function skin largest organ sentry layers. Hair, skin nails excel contains zinc glycinate, a highly bioavailable form of zinc that is more easily absorbed than some other types of zinc e. Skin is composed of the epidermis, dermis, and adnexal structures. Function of skin, hair and nails skin provides a physical barrier against the external environment and helps reduce water loss by means of the waterimpermeable stratum corneum.