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.
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
Eyebrow loss signifies a range of disorders in the body, from eyelid inflammation to a variety of autoimmune disorders, according to the International Journal of Trichology. The loss of the eyebrows is a clinical hallmark of leprosy in India.Full Answer >
According to Encyclopedia Britannica, the main function of the ejaculatory duct is to combine the sperm stored in the ampulla with seminal fluids and then transport them to the prostate. Healthline also states that semen flows through these ejaculatory ducts during ejaculation in order to exit the body.Full Answer >
A bronchus is an airway within the lungs, and its function is to carry air through the lung tissue. There are two primary bronchi, which split into the right and left lungs at the base of the trachea.Full Answer >
Tongue rolling was once believed to be purely a genetic trait. However, Dr. John H. McDonald of the University of Delaware points out that recent studies show that there are factors beyond genetics in determining who can and cannot roll their tongue.Full Answer >