The hypodermis participates, passively at least, in thermoregulation since fat is a heat insulator. Melanin gives color to the hair, skin, and other structures in the body.
Dense hair covers the scalp, axilla, and pubis in adults. Part of the process occurs when ultraviolet light from the sun strikes precursor molecules in the skin. The arrector pili form goose bumps by contracting to move the hair follicle and lifting the hair shaft upright from the surface of the skin.
In animals, this makes the animal look larger and more threatening. The alcohol in the blood is absorbed by the cells of the sweat glands, causing it to be excreted along with the other components of sweat.
When our skin is not exposed to sufficient amounts of sunlight, we can develop vitamin D deficiency, potentially leading to serious health concerns. The loss of oil sebum also contributes to wrinkling, with oilier skin wrinkling less.
The ducts of apocrine sweat glands extend into the follicles of hairs so that the sweat produced by these glands exits the body along the surface of the hair shaft. These ridges provide some friction, helping to grasp objects. A hair is primarily dead keratinized cells and is produced by the hair bulb.
Dead keratinocytes are constantly being shed from the surface of the stratum corneum and being replaced by cells arriving from the deeper layers.
Nails normally reflect a pinkish tone because of rich vascular areas in the fingers. Nostril hair protects against inhaling objects, such as foreign particles or insects. This movement results in more air being trapped under the hairs to insulate the surface of the body. Nostril hair protects against inhaling objects, such as foreign particles or insects.
In youth, collagen is loose and elastic. The body can produce all the necessary vitamin D in this way, provided enough sunlight is available. When present, the medulla usually contains highly pigmented cells full of keratin.
Each hair grows from a tiny sac or bulb within a hair follicle see Fig. Sebum also helps to waterproof the top layer of the epidermis the stratum corneum. The dermal papillae increase the surface area of the dermis and contain many nerves and blood vessels that are projected toward the surface of the skin.
The hair follicle is a depression of epidermal cells deep into the dermis. The cells of the stratum basale include cuboidal keratinocytes, melanocytes, and Merkel cells.
Vitamin D3 is converted in the kidneys into calcitriol, the active form of vitamin D.
Basic Structure and Function of the Nervous System Nervous Tissue The Function of Nervous Tissue The skin protects the rest of the body from the basic elements of nature such as wind, water, and UV sunlight.
Functions of the Integumentary System by Rice University is licensed under a Creative Commons. Basic Structures of the Integumentary System - Free ebook download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online.
Scribd is the world's largest social reading and publishing site. Basic Structures of the Integumentary System - Free ebook download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online.
Scribd is the world's largest social reading and publishing site. The skin and its accessory structures form the body’s integumentary system. Integument means covering. Because skin covers the entire outside of the body, it is the body’s largest organ.
The skin of an average adult covers to square meters ( sq. ft.) and is about 2 to 3 mm ( inch) thick. The skin and its accessory structures form the body’s integumentary system. Integument means covering. Because skin covers the entire outside of the body, it is the body’s largest organ.
REVIEW SHEET The Integumentary exercise7 System Review Sheet 7 Basic Structure of the Skin 1. Complete the following statements by writing the appropriate word or phrase on the correspondingly numbered blank: The two basic tissues of which the skin is composed are dense irregular.The integumentary system basic structure of