Skin

The skin is the largest organ of the human body. It protects us from the environment, regulates our temperature, and allows us to feel sensations. The average person has about 2 square meters of skin and weighs approximately 6 pounds.

The skin is composed of three main layers: the epidermis, dermis, and subcutaneous tissue. The epidermis is the outermost layer of the skin. It is composed of cells called keratinocytes, which produce the protein keratin.

The dermis is the middle layer of the skin. It contains blood vessels, nerve endings, sweat glands, and hair follicles. The subcutaneous tissue is the innermost layer of the skin. It is composed of fat and connective tissue.

Skin plays an important role in protecting the body from infection and injury. The epidermis provides a barrier to bacteria, viruses, and other potentially harmful substances.

The dermis contains blood vessels that help to heal wounds. The subcutaneous tissue helps to insulate the body and protect it from heat and cold.

Skin also plays an important role in regulating body temperature. The sweat glands in the skin help to cool the body by releasing sweat. The blood vessels in the skin can also constrict or dilate to regulate body temperature.

Skin is also responsible for our sense of touch. The nerve endings in the skin allow us to feel sensations such as pressure, pain, and heat.

The skin is a complex and vital organ that plays an important role in protecting and regulating the human body.

Books discussing Skin

Experts discussing Skin