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

You are watching: Why are injections frequently administered into the hypodermis?

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summary

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


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


Anatomy and Structure

The hypodermis contains the cells known as fibroblasts, adipose organization (fat cells), connective tissue, bigger nerves and blood vessels, and also macrophages, cells which are part of the immune system and help keep her body totally free of intruders.


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


function (Physiology)

The hypodermis may at first be regarded as organization which is used mostly for the warehouse of fat, yet it has other crucial functions together well. These attributes include:


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

problems Which affect the Hypodermis

There space several clinical disorders and also medical actions which are concerned this distinctive layer the the skin:


Hypothermia and Overheating: The thinning that the hypodermis with age is one of the factors that older human being are more prone come hypothermia. If you are ordinarily hot, this news is not necessarily for this reason good. The thinning of the hypodermis likewise may mean that girlfriend sweat less, and also a absence of sweat is crucial in problems such as warmth exhaustion and also heatstroke.


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


Obesity: Excess body fat is situated in the hypodermis, a class that has received a the majority of attention in current years because of the growing rate of obesity, and the thought that no all human body fat is equal, at the very least with respect come the function it might play in metabolic syndrome and also heart disease.


The Hypodermis and Aging

While the hypodermis is no visible, it can have a dramatic effect on the illustration of the skin and the way aging effects the skin, specifically in the area the the face and neck. Through aging, the volume of facial fat decreases and also there is much less supportive tissue to assistance the typical turgor and also elasticity the the skin. The facial skin begins to droop and also sag leading to a watch that deserve to be understood as showing up tired. The bones and muscles the the face likewise lose volume.


Hyaluronic mountain Fillers for Aging

To exactly the loss of face volume and also counteract the impacts of aging, hyaluronic mountain fillers, supplied specifically for volume replacement, deserve to be injected.Hyaluronic acid is compatible through the body and may it is in a good choice because that facial filler. That is discovered naturally in the body v high concentrations in soft connective tissue and also the fluid that surrounds the eyes. That is likewise found in cartilage and joint fluids.


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


While side results are rare, over there are threats to injections of hyaluronic acid. There is a threat of allergy reactions, and of course, the cosmetic an outcome may not be what you had hoped.


Bottom line on the Hypodermis

While many civilization think the the hypodermis as merely a great of the skin which shop fat, the is also an extremely important in preserving body temperature and other functions.


The hypodermis fulfills several necessary functions:

Stores fat (energy)Offers security by acting together a shock absorberAttaches top skin great (dermis and epidermis) to bones and also cartilageSupports frameworks inside it, consisting of nerves and blood vesselsRegulates human body temperatureProduces hormones

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


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Verywell health and wellness uses only high-quality sources, including peer-reviewed studies, to assistance the facts within our articles. Review our editorial process to learn 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 Cotran Pathologic communication of Disease. Philadelphia, PA: Elsevier/Saunders, 2015. Print.

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