The three layers skin are the fat layer, the dermis and the epidermis. The topmost layer is the epidermis, and the bottom layer is the fat layer, also called the subcutis.Know More
The fatty layer serves as insulation, protection and energy storage for the body. It consists of fat cells in a matrix of fibrous tissue.
The dermis features mainly tissues called collagen, elastin and fibrillin. Nerve endings, sweat glands, hair follicles and blood vessels also live in the dermis.
The epidermis is a thin layer composed mainly of keratinocytes. It protects the body from foreign objects, such as bacteria, viruses and other substances. In the epidermis lies cells called Langerhans, which play a part in protecting the body against infection. Melanocytes also inhabit the epidermis. These cells secrete melanin, a pigment that protects the body from UV rays and gives skin its color.Learn more about Human Anatomy
The skin's dermis is made of layers of cells, connective tissue and several structures that aid in maintaining its function. These structures include blood vessels, hair follicles, lymph vessels and glands.Full Answer >
The four appendages of the skin include sebaceous or oil glands, sweat or sudoriferous glands, hair, and nails. The appendages reside in the dermis and are generated in the epidermis.Full Answer >
The dermis is filled with tiny blood vessels and sensory nerves that allow the skin to feel different temperatures. When the skin becomes too hot, the blood vessels will expand to release heat, when the skin is too cold, the blood vessels will contract to keep heat in. The sweat glands are also located in the dermis layer of the skin.Full Answer >
Meissner's corpuscles, also known as tactile corpuscles, are nerve endings that are responsible for detecting a light touch to the skin. The are considered a type of mechanoreceptor since they are responsive to physical pressure. Meissner's corpuscles have the lowest sensitivity threshold of any type of mechanoreceptor; they can sense vibrations with frequencies as low as 10 Hertz.Full Answer >