William Truswell, MD, is a board-certified face plastic surgeon and also otolaryngology (head and neck) surgeon. He is chairman of the American board of facial Plastic and also Reconstructive Surgery and also treats skin cancer patient as component of his practice." data-inline-tooltip="true">William Truswell, MD
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Normal skin pathology.

You are watching: Why is the hypodermis not part of the skin

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synopsis

The hypodermis is the innermost (or deepest) and thickest great of skin. It is likewise known as the subcutaneous great or subcutaneous tissue.


The great of the skin encompass the epidermis (the outermost layer), the dermis (the following layer i m sorry is loaded v blood vessels and nerves), and also then the hypodermis.


Anatomy and also Structure

The hypodermis has the cells recognized as fibroblasts, adipose tissue (fat cells), connective tissue, larger nerves and blood vessels, and also macrophages, cell which are component of the immune mechanism and aid keep her body totally free of intruders.


The thickness the the hypodermis varies in different regions the the body and also can differ considerably in between different people. In fact, the thickness the the hypodermis plays critical role in distinguishing in between males and females. In men, the hypodermis is thickest in the abdomen and shoulders, whereas in females it is thickest in the hips, thighs, and also buttocks.


function (Physiology)

The hypodermis may at an initial be perceived as tissue which is used mainly for the warehouse of fat, but it has actually other important functions as well. These features include:


Storing fat (energy storage)Protection (thinkbuttocks and sitting on a hard chair)Attaching the upper skin layers (dermis and epidermis) to underlying organization such as your bones and also cartilage, and also supporting the structures within this layer such together nerves and blood vesselsBody temperature regulation: This layer attributes as an insulator, giving protection against the cold, and protects the body against heat also through sweating.

problems Which impact the Hypodermis

There space several medical disorders and medical actions which are regarded this distinct layer of the skin:


Hypothermia and also Overheating: The thinning the the hypodermis with age is among the factors that older people are more prone come hypothermia. If you are ordinarily hot, this news is no necessarily therefore good. The thinning the the hypodermis additionally may average that friend sweat less, and a absence of sweat is necessary in problems such as heat exhaustion and also heatstroke.


Injections: While countless medications are given intravenously, some room injected into the hypodermis (subcutaneous layer). Examples of medicines which might be given by subcutaneous (subQ) injection encompass epinephrine because that allergic reactions, part vaccinations, insulin, part fertility drugs, some chemotherapy medications, expansion hormone, and also anti-arthritis medicine such together Enbrel. Medications offered by subcutaneous injections space absorbed more slowly than drugs provided by intravenous injection, make subQ injections suitable route for countless drugs.


Obesity: Excess body fat is located in the hypodermis, a layer that has actually received a many attention in current years due to the farming rate of obesity, and the thought that no all human body fat is equal, at the very least with respect to the duty it may play in metabolic syndrome and heart disease.


The Hypodermis and also Aging

While the hypodermis is no visible, it can have a dramatic result on the appearance of the skin and the way aging effects the skin, specifically in the area the the face and neck. Through aging, the volume of face fat decreases and there is much less supportive organization to assistance the typical turgor and elasticity that the skin. The facial skin begins to droop and also sag bring about a look at that deserve to be taken as showing up tired. The bones and also muscles the the face additionally lose volume.


Hyaluronic acid Fillers because that Aging

To exactly the loss of face volume and also counteract the results of aging, hyaluronic acid fillers, used specifically for volume replacement, deserve to be injected.Hyaluronic mountain is compatible with the body and may it is in a an excellent choice for facial filler. The is discovered naturally in the body through high concentration in soft connective tissue and the liquid that surrounds the eyes. That is likewise found in cartilage and joint fluids.


An injection of hyaluronic mountain filler will assistance facial structures and tissues that have actually lost volume and elasticity. That acts as a volumizer by pass water to the surface of the skin, making the look much more supple and fresh. The plumps and also lifts cheeks, jawlines, and temples. The filler can likewise fill out thin lips and plump hands the have begun to sag.


While side results are rare, over there are threats to injections that hyaluronic acid. Over there is a threat of allergic reactions, and also of course, the cosmetic an outcome may no be what you had hoped.


Bottom heat on the Hypodermis

While many world think the the hypodermis as just a layer of the skin which stores fat, that is also very important in maintaining body temperature and other functions.


The hypodermis fulfills several essential functions:

Stores fat (energy)Offers defense by acting as a shock absorberAttaches upper skin class (dermis and also epidermis) come bones and cartilageSupports structures inside it, consisting of nerves and also blood vesselsRegulates body temperatureProduces hormones

The hypodermis consists of fibroblasts (a form of cell generally found in connective tissues),adipose organization (fat cells), macrophages (a kind of white blood cell that protects the human body from harmful bacteria), and connective organization that host blood vessels and nerves.


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Verywell health and wellness uses just high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn much more about how we fact-check and keep our contents accurate, reliable, and trustworthy.
Kumar, Vinay, Abul K. Abbas, Jon C. Aster, and James A. Perkins. Robbins and also Cotran Pathologic basis of Disease. Philadelphia, PA: Elsevier/Saunders, 2015. Print.

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