Subcutaneous Tissue Layer: Definition & Injections

An error occurred trying to load this video.

Try refreshing the page, or contact customer support.

Coming up next: Alternative Splicing of Genes: Definition, Mechanism & Regulation

You're on a roll. Keep up the good work!

Take Quiz Watch Next Lesson
Your next lesson will play in 10 seconds
  • 0:00 Subcutaneous Tissue…
  • 0:32 Functions
  • 1:05 Subcutaneous Injections
  • 2:20 Lesson Summary
Save Save Save

Want to watch this again later?

Log in or sign up to add this lesson to a Custom Course.

Log in or Sign up

Speed Speed

Recommended Lessons and Courses for You

Lesson Transcript
Instructor: Adrianne Baron

Adrianne has taught high school and college biology and has a master's degree in cancer biology.

Learn all about the subcutaneous tissue layer and its purpose for being on the body. We will also review different injections that can be administered through the subcutaneous tissue layer and the best places for those injections.

Subcutaneous Tissue Layer Defined

There are many places on earth that have very cold and sometimes harsh winters. We are somehow able to withstand those conditions. This is largely due to a layer of fat that lies just beneath the top two layers of the skin. The skin is composed of the outer layer or epidermis, the middle layer or dermis and the inner fat layer or subcutaneous tissue layer. The fat contained in the subcutaneous tissue layer is referred to as adipose tissue, tissue composed of fat cells.


The subcutaneous tissue layer has a few different functions, one of which is to provide insulation to help maintain our body's temperature when we are in cold environments. This is why we don't freeze to death when we walk outside into cold air.

Another purpose for the subcutaneous tissue layer is to anchor the other layers of the skin to the muscles beneath the skin. The subcutaneous tissue layer also functions to protect the muscles and bones whenever we fall or hit our bodies on something. The last function of the subcutaneous tissue layer is to act as a passageway for the blood vessels and nerves from the dermis of the skin into the muscles.

Subcutaneous Injections

Some medications need to get into the bloodstream and take effect quicker, and others should be absorbed more slowly. Medications administered through the subcutaneous tissue layer are ones that are meant to be absorbed slowly by the body.

To unlock this lesson you must be a Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use

Become a member and start learning now.
Become a Member  Back
What teachers are saying about
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create an account