What are the 3 layers within the skin?
Epidermis. Dermis. Subcutaneous fat layer (hypodermis)
What are the 3 types of barriers the skin provides?
Terms in this set (35)
- Skin. three barriers: chemical, mechanical, and biological.
- chemical barriers. skin secretion and melanin.
- skin secretion. low pH: ACID MANTLE- too acidic for bacteria.
- melanin.
- mechanical barriers.
- biological barriers.
- langerhan cells.
- dermal macrophages.
Which type of hair includes scalp hair?
Terminal Hair? Is the long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females. -usually has a medulla, with expectional of gray hair. -Hormonal changes during puberty causes some areas of fine vellus hair to be replaced with thicker terminal hair.
What two tissues make up the integumentary system?
7 Integumentary System Human skin is divided into two main parts: the dermis and the epidermis. The dermis is made of connective tissue and is covered on its surface by a thick layer of stratified squamous epithelium that we call the epidermis.
What is the thickness of skin?
Although it is only about 2 mm thick (about 0.07 inches) it covers about 20 square feet of surface and weighs about 3 killograms (just over 6 pounds). Depending on how you count them, the human skin has three layers.
How thick is the epidermis and dermis?
The dermis is a tough but elastic support structure that houses nerves, blood vessels, lymphatics, and cutaneous appendages (pilosebaceous units, eccrine and apocrine sweat glands). It is thicker (averages 1 to 4 mm) than the epidermis which is about as thin as piece of paper.
What kind of barrier is skin?
The skin barrier is designed to be impermeable, meaning it keeps water in and bacteria and microorganisms out. Think of your skin as a brick wall. Skin is made up of “bricks” (protein from skin cells) and “mortar” (lipids and improtant fats).
What forms skin barrier?
The physical barrier localized primarily in the stratum corneum (SC) and consists of protein-enriched cells (corneocytes with cornified envelope and cytoskeletal elements, as well as corneodesmosomes) and lipid-enriched intercellular domains.
