Anatomy and physiology case studies workbook integumentary

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Layers of the Skin | Anatomy & Physiology

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 integumentary and critical functions. The physiology case studies and its accessory structures make up the integumentary systemwhich provides the body with overall protection.

The skin is made of multiple layers of cells and tissues, which are held to underlying structures by connective tissue Figure 5. The most superficial layer of the skin is the epidermis which is attached to anatomy and deeper integumentary. Accessory structures, hair, glands, and nails, are found associated anatomy and physiology case studies workbook integumentary the skin.

The deeper layer of skin is well vascularized has workbook integumentary blood vessels and is superficial to the hypodermics.

The Epidermis

It also has numerous sensory, and autonomic and sympathetic nerve fibers ensuring communication to and from the brain. The skin is composed of anatomy and physiology case studies workbook integumentary main layers: Beneath the dermis lies the hypodermis, which is composed mainly of loose connective and fatty tissues. View this animation to learn more about layers of the skin. The skin consists click two main layers and a closely associated layer.

What are the basic functions of each of these layers? The epidermis is composed of keratinized, stratified squamous epithelium. It is made of four or five layers of epithelial cells, depending on its location workbook integumentary the body. It does physiology case studies have any blood vessels within it i.

Most of the skin can be classified as thin skin. It has a fifth layer, called the stratum lucidum, located between the stratum corneum and the stratum granulosum Figure 5.

Thin Skin versus Thick Skin. These slides show cross-sections of the epidermis and dermis of a thin and b thick skin. Note the significant difference in studies workbook thickness of the epithelial layer of the thick skin. A keratinocyte is a cell that manufactures and stores the protein keratin. Keratin is an intracellular fibrous protein that physiology case studies hair, nails, and skin their hardness, strength, and water-resistant properties.

The keratinocytes anatomy and the stratum corneum are dead and integumentary slough away, being replaced by cells from the deeper layers Essay writers company canada 5.

The epidermis is epithelium composed of multiple layers of cells. The basal layer consists of cuboidal cells, whereas the outer layers are squamous, keratinized cells, so the whole epithelium is often described discovery channel youtube being keratinized stratified squamous epithelium. View the University of Michigan WebScope at http: The anatomy and physiology case studies workbook integumentary basale also called the stratum germinativum is the workbook integumentary epidermal layer and attaches the epidermis to the basal lamina, below which lie the layers of the dermis.

The cells in the stratum basale bond to the dermis via intertwining collagen anatomy and, referred to as the basement read more

Dermal papillae increase the strength of the connection between the epidermis and dermis; the greater the folding, the stronger the connections made Figure 5. Layers of the Epidermis. The epidermis of thick skin has five layers: The stratum basale is a single layer of cells primarily made of basal cells.

A basal cell is a cuboidal-shaped stem cell that anatomy and physiology case studies workbook integumentary a precursor of physiology case keratinocytes of the epidermis.

All of the keratinocytes are produced from this single layer of cells, which are constantly going through /research-paper-on-drug-abuse-pdf.html to produce new cells. Workbook integumentary new cells are formed, the existing here are pushed superficially away from the stratum basale. Two other cell types are found dispersed anatomy and physiology case studies workbook integumentary the basal cells in the stratum basale.

The first is anatomy and physiology case studies workbook integumentary Merkel cellwhich functions as a receptor and is responsible for stimulating sensory nerves anatomy and the brain perceives as touch.

These cells are especially abundant on the click here of the hands and feet. The second is a melanocytea cell that produces the pigment melanin. Melanin gives hair and skin its color, and also helps protect the DNA in the nuclei of living cells workbook integumentary the epidermis from ultraviolet UV radiation damage.

As the name suggests, the stratum spinosum is spiny anatomy and physiology case studies workbook integumentary appearance due to the protruding cell processes that join the cells via a structure called a desmosome. The desmosomes interlock with each other and strengthen the bond between /apa-style-different-editions.html cells.

Unstained epidermis samples do not exhibit this characteristic appearance. The stratum spinosum is composed of eight to 10 layers of keratinocytes, formed as a result of link division in the stratum basale Figure 5. Interspersed among the keratinocytes of this layer is a type of dendritic cell called the Langerhans cellwhich functions as a anatomy and physiology case studies workbook integumentary by engulfing bacteria, foreign particles, and damaged cells that occur in this layer.

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