integumentary system structure

Because certain substances can enter the bloodstream through the capillary networks in the skin, patches can be used to deliver medications in this manner for conditions ranging from heart problems (nitroglycerin) to smoking cessation (nicotine patches).

The dermis is a “functional” layer. The skin also takes part in a variety of biochemical synthetic processes, such as vitamin D production under the influence of ultraviolet radiation, but also the production of cytokines and growth factors. The epidermis is composed of five sublayers: The epidermis includes two distinct types of skin: thick skin and thin skin. The integumentary system consists of the skin, hair, nails, glands, and nerves. Thus, the skin and other parts of the integumentary system work with other systems in your body to maintain and support the conditions that your cells, tissues, and organs need to function properly.

Under the nail body is a layer of epidermis and dermis known as the nail bed.

The components of the integumentary system receive their innervation, mostly autonomic, via spinal and cranial nerves. If you look in the mirror you see it, if you look anywhere on your body you see and if you look around you in the outside world, you see it.
As the follicle produces new hair, the cells in the root push up to the surface until they exit the skin. Sweat produced by sudoriferous glands delivers water to the surface of the body where it begins to evaporate.

The organs of the integumentary system form a water-proof layer over the body that also work as a physical barrier against microorganisms that cause integumentary system diseases. They are located in the subcutaneous tissue overlying the pectoralis major and minor muscles. “I would honestly say that Kenhub cut my study time in half.” Elimination. They occur at orifices in areas like the lips, nostrils, conjunctivae, urethra, vagina, foreskin and anus. Structures of the integumentary systemSebaceous glands microscopic glands located adjacent to ahair follicle3.05 Remember the structures of theintegumentary system 13 13. (adsbygoogle=window.adsbygoogle||[]).push({}); Vitamin D, an essential vitamin necessary for the absorption of calcium from food, is produced by ultraviolet (UV) light striking the skin. The stratum basale and stratum spinosum layers of the epidermis contain a sterol molecule known as 7-dehydrocholesterol. The hair shaft consists of the part of the hair that is found outside of the skin.

The hypodermis is filled with subcutaneous nerves, vessels and lymphatics. The spines found here are cellular projections called desmosomes that form between keratinocytes to hold them together and resist friction. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. Well, we're looking for good writers who want to spread the word. These cookies do not store any personal information.

All rights reserved. Vasoconstriction is the process of smooth muscles in the walls of blood vessels in the dermis contracting to reduce the flood of blood to the skin.

The glands produce sweat, which is important for thermoregulation. Minor mechanical damage from rough or sharp objects is mostly absorbed by the skin before it can damage the underlying tissues. By the time keratinocytes reach the stratum spinosum, they have begun to accumulate a significant amount of keratin and have become harder, flatter, and more water resistant. Learn about The Nobel Prizes that have been awarded since 1901, as well as the criteria and nomination process that are used to select the winners. The skin is the main organ of the integumentary system. Â. They are long, unbranched, tubular structures with a highly coiled secretory portion situated deep in the dermis. The spindle-shaped and tightly packed cortex cells contain pigments that give the hair its color. The nerve cell connections in the brain sense these signals as pain. The direct cutaneous are derived directly from the main arterial trunks and drain into the main venous vessels.

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