Reply To: Week 7 – Discussion Board 1

Welcome To Interpreters Associates, Inc. Forums Week 7 – Discussion Board 1 Reply To: Week 7 – Discussion Board 1

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Sara Abbasova # Posted on October 21, 2022 at 5:41 pm

Unbeknownst to most, the skin is actually the body’s largest organ, spanning about 20 square feet. It protects from foreign elements or microbes, regulates body temperature, and allows sensation (of heat and cold as well). About one inch of the skin contains around 19 million cells, 60k melanocytes, 1k nerve endings, and 20 blood vessels. The skin has three layers.

The epidermis is the outermost layer of the skin, it’s the one we see and touch. It is made up of proteins and keratin in the cells that stick together. It acts as a protective barrier, keeping out bacteria and germs, also elements such as rain or UV light. It makes new skin cells every thirty days they replace about 40k old skin cells that the body sheds daily. The Langerhans cells help fight off germs and infections since they are a part of the immune system. The epidermis also provides skin color since it contains melanin. People who produce more melanin, are darker skinned and tan quickly, as opposed to those who don’t produce as much. Melanin determines the color of skin, eyes, and hair.

The dermis is the layer in the middle, beneath the epidermis and it contains about 90% of the skin’s thickness. It has collagen and elastin – collagen makes the cells strong, and elastin helps keep the skin flexible. Both help the stretched skin regain its shape. The roots of hair follicles which are attached to the dermis grow hair. The nerves and their receptors help you feel the texture, heat, and pain of things. The oil glands keep the skin smooth and soft, also preventing it from absorbing too much water. The sweat glands produce and release sweat through pores which helps with body temperature regulation. The blood vessels provide nutrients to the epidermis and help keep the skin layers healthy.

The hypodermis is the innermost layer of the skin – the fatty layer, also known as subcutaneous tissue. The fatty tissue protects muscles and bones from injuries. It has connective tissue that connects layers of the skin to muscles and bones. The nerves and blood vessels in the dermis branch out and become larger to connect the hypodermis to the rest of the body. The fat helps in the regulation of body temperature.