Table of contents

Prepare for your exams

Upload your syllabus and get recommendations on what to study and when. No syllabus? Sharing your exam schedule works too.

Skip topic navigation

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

5. Integumentary System

The Hypodermis

5. Integumentary System

The Hypodermis: Videos & Practice Problems

Video Lessons Practice Worksheet

Topic summary

The hypodermis, or subcutaneous layer, lies beneath the dermis and is primarily composed of adipose tissue, which contains adipocytes that store triglycerides. This layer anchors the skin to underlying tissues, acts as a shock absorber, and reduces heat loss, helping to maintain body warmth. It is vascular, containing numerous blood vessels, and also includes areolar connective tissue. Understanding the hypodermis is crucial for grasping the integumentary system's structure and function, emphasizing its role in insulation and protection.

concept

The Hypodermis

Video duration:

Play a video:

Was this helpful?

The Hypodermis Video Summary

The hypodermis, also known as the subcutaneous layer, is a crucial component of the integumentary system, lying beneath the dermis and not technically classified as part of the skin. The term "hypodermis" derives from the Greek root "hypo," meaning below, while "subcutaneous" comes from the Latin "sub," also meaning below. This layer primarily consists of adipose tissue, which is a type of loose connective tissue made up of adipocytes, or fat cells, that store fats in the form of triglycerides. Additionally, the hypodermis contains areolar connective tissue, another form of loose connective tissue that provides support and elasticity.

The hypodermis serves several essential functions. It anchors the skin to the underlying tissues, acting as a stabilizing layer. This anchoring is vital for maintaining the integrity of the skin and its connection to deeper structures. Furthermore, the hypodermis acts as a shock absorber, protecting underlying tissues from mechanical trauma. Its composition of adipose tissue also plays a significant role in thermoregulation, as it reduces heat loss and helps maintain body temperature in colder environments.

In terms of vascularity, the hypodermis is rich in blood vessels, which facilitate nutrient exchange and thermoregulation. The presence of these blood vessels is essential for the overall health of the skin and the underlying tissues. Understanding the structure and function of the hypodermis is fundamental for comprehending how the skin interacts with the body and its environment.

example

The Hypodermis Example 1

Video duration:

Play a video:

Was this helpful?

The Hypodermis Example 1 Video Summary

The body stores excess fat in the hypodermis for several important reasons, each contributing to overall health and functionality. One primary function of this fat storage is insulation. The hypodermis, which is the deepest layer of skin, contains adipose tissue that helps retain body heat, making it easier for individuals with more fat to stay warm in colder environments.

Additionally, the adipose tissue in the hypodermis serves as a protective cushion for internal organs. This cushioning effect acts as a shock absorber, safeguarding vital organs from potential impacts and injuries. This protective role is crucial for maintaining the integrity of the body's internal structures.

Moreover, fat stored in the hypodermis acts as an energy reserve. When carbohydrate resources are low, the body can break down fat molecules to release energy into the bloodstream. This process is essential for sustaining energy levels during periods of fasting or intense physical activity.

In summary, the storage of excess fat in the hypodermis is beneficial for insulation, organ protection, and energy reserves, highlighting the multifaceted roles of adipose tissue in maintaining homeostasis and supporting bodily functions.

Problem

Elderly people have less subcutaneous fat than younger people. Which of these is something they experience due to having a thinner hypodermis?

They aren't as physically strong.

They are more sensitive to the cold.

Their skin is tougher.

Their stratum corneum sheds faster.

Do you want more practice?

We have more practice problems on The Hypodermis

Here’s what students ask on this topic:

What is the hypodermis and where is it located?

The hypodermis, also known as the subcutaneous layer, is a layer of tissue that lies beneath the dermis. It is not technically part of the skin but is crucial for its function. The hypodermis is primarily composed of adipose tissue, which contains adipocytes that store triglycerides, and areolar connective tissue. This layer anchors the skin to underlying tissues, acts as a shock absorber, and reduces heat loss, helping to maintain body warmth. It is also vascular, containing numerous blood vessels.

What are the main functions of the hypodermis?

The hypodermis serves several important functions. Firstly, it anchors the skin to the underlying tissues, providing structural support. Secondly, it acts as a shock absorber, protecting the tissues beneath from mechanical damage. Thirdly, the hypodermis helps to reduce heat loss, acting as an insulator to maintain body warmth. Additionally, it stores energy in the form of triglycerides within adipocytes and contains blood vessels that supply nutrients and oxygen to the skin.

What types of tissues are found in the hypodermis?

The hypodermis is primarily composed of two types of loose connective tissues: adipose tissue and areolar connective tissue. Adipose tissue contains adipocytes, which are fat cells that store triglycerides. This tissue is crucial for energy storage, insulation, and cushioning. Areolar connective tissue, on the other hand, provides a flexible and supportive matrix that helps to anchor the skin to underlying structures. Both types of tissues contribute to the hypodermis's role in protection, insulation, and structural support.

Is the hypodermis considered part of the skin?

No, the hypodermis is not technically considered part of the skin. The skin is composed of two main layers: the epidermis and the dermis. The hypodermis, also known as the subcutaneous layer, lies beneath the dermis. Despite not being part of the skin, the hypodermis plays a crucial role in supporting the skin's functions by anchoring it to underlying tissues, acting as a shock absorber, and providing insulation to reduce heat loss.

How does the hypodermis contribute to body temperature regulation?

The hypodermis contributes to body temperature regulation primarily through its insulating properties. The adipose tissue within the hypodermis contains fat cells that store triglycerides, which act as an insulator to reduce heat loss from the body. By minimizing heat loss, the hypodermis helps to maintain a stable internal body temperature, especially in cold conditions. Additionally, the blood vessels within the hypodermis can constrict or dilate to regulate blood flow and heat distribution, further aiding in temperature regulation.