The skin, outermost layer of the human body serves as the body’s initial barrier against both external harmful substances and foreign particles. It is the largest organ of the human body and functions as a barrier between outside and inside environment. Skin is composed of different layers, cells, and tissues.
Human skin plays an important role in overall health and well-being, which is divided into three main areas namely: dermis, epidermis and hypodermis.
Here, in this article let us discuss the differences between dermis and epidermis. The main difference between epidermis and dermis lies in their structure.
What is Epidermis?
The epidermis is the outermost layer of the skin, which is composed of cells called keratinocytes – made of a protein called keratin. The epidermis is made of four main layers and functions by protecting and safeguarding the internal cells and tissues.
What is Dermis?
The dermis is the layer of the skin present beneath the epidermis of the skin. This layer constitutes of fat, fibres, collagen and blood vessels which make the skin flexible and strong. The dermis is also involved in the synthesis of Vitamin D on exposure to sunlight. They are also involved in regulating body temperature.
The various differences between the two are given below in a tabular column.
Differences Between Epidermis and Dermis
|An outer most layer of cells that cover the body of an organism||A layer of living cells below epidermis consisting of nerve endings, blood vessel, sweat glands and hair follicle|
|Doesn’t contain blood vessels||Comprises a thin network of vessels known as capillaries|
|No nerves present in the epidermis||Comprises nerves that conduct nerve impulses from the central nervous system towards the brain. The sensation of pain originates from the open nerve ending of this layer.|
|Found in both plants and animals||Found in animals only|
|Obtains essential nutrients and oxygen by diffusion from the dermis||Obtains oxygen and nutrients from the blood capillaries|
These were a few differences between dermis and epidermis.
The epidermis and dermis together form the basic body covering of the skin and both perform the function of protecting internal organs from dehydration, infectious diseases and other damages.
Also Refer: Sense Organs
Learn more in detail about the Skin, Epidermis, Dermis, its structure, functions and other related topics @ Byju’s Biology