Do you know of a waterproof, stretchy, wrinkle-free, self-regenerating garment that adapts to external temperatures and is exceptionally durable? Such a garment exists: it’s skin.
How Is Skin Structured? A Closer Look:
The Outer Layer: The Epidermis
- What is the structure of the epidermis? The epidermis is made up of cells and lipids. The predominant cells are keratinocytes, which are constantly renewing and migrating toward the surface. During this process, keratinocytes gradually lose their nucleus and die. Once they reach the surface, the keratinocytes are shed—this is known as desquamation.
- What is the role of the epidermis? The layered arrangement of cells combined with lipids forms a skin barrier that protects against external aggressions and trauma. When the skin barrier is damaged, bacteria and other germs can penetrate and find an environment conducive to their growth.
Warning: Your dog’s and cat’s epidermis is thinner and less acidic than human skin. To care for their skin properly, only use specially formulated shampoos, creams, and sprays.
The Middle Layer: The Dermis
- What Is the Structure of the Dermis? Made up of connective tissue, cells, and proteins, this is where sebaceous glands and hair follicles are located, along with nerves and numerous blood vessels.
- What Is the Role of the Dermis? The structures housed in the dermis enable the skin to perform many key functions, such as maintaining hydration and electrolyte balance, wound healing, immunity, and vitamin D synthesis. It is also in the dermis that proteins like collagen and elastin are produced, giving the skin its elasticity and suppleness.
Did You Know? It’s the sensory receptors and nerve endings in the dermis that allow skin to sense its surroundings (touch, pressure, temperature, pain).
The Deep Layer: The Hypodermis
- What is the structure of the hypodermis? It consists of connective tissue, blood vessels, nerves, and subcutaneous fat.
- What is the role of the hypodermis? The hypodermis acts as an interface with underlying structures (muscles). It primarily serves as a fat storage site, which can act as an energy reserve or provide insulation against the cold. This fatty layer also offers mechanical protection by absorbing shocks.
In conclusion, the skin is a complex organ that performs multiple vital roles and deserves special attention (skin changes: when to worry) to maintain the health and well-being of our four-legged companions.
Bibliography:
DermaVet – Veterinary Dermatology: This website provides information on canine and feline dermatology.
DermaVeto — dermatoveto.fr: A website created by a veterinary dermatology specialist
