Skin constantly regenerates and takes approximately 27 days to regrow, while damaged skin growth can vary depending upon the nature and severity of the injury. Scraped skin can take as long as three weeks to grow back, whereas burned skin can take months for regrowth.Know More
The outer layer of the skin is comprised of dead skin cells overlaying the epidermis, which is the topmost, living layer of skin. As skin cells die, they either flake off or are washed away with water.
Damaged skin can have healing growth stimulated through various means, such as stitches for deep or wide cuts that shorten the distance for new skin growth over the wound.Learn more about Organs
The skin is made up of three layers, including the epidermis, dermis and hypodermis, according to the American Academy of Dermatology. While there are technically no upper and lower epidermises, these terms are often used in place of epidermis and dermis. Each layer of skin is highly specialized and serves many functions.Full Answer >
The stratum granulosum functions as the waterproofing layer of the skin that prevents fluid loss, according to the Loyola University Medical Education Network. Keratin accumulates in this layer by a process that forms a thicker layer of skin cells to protect less dense cells underneath. Lipids and keratin organize as flat skin cells without their nuclei, according to Dr. Heather Brannon for About.com.Full Answer >
Black eyes are caused by bleeding underneath the skin due to blunt impact. The skin underneath the eyes is thinner, so blood pooling in the area is more obvious than in other areas, giving the distinctive shine to a black eye.Full Answer >
The four organs of excretion are the kidneys, the lungs, the skin and the liver. Excretion is the process of elimination of toxic waste products and substances in excess of requirements from the human body.Full Answer >