What is the correct order of epidermal layers?
What is the correct order of epidermal layers?
The epidermis consists of several layers beginning with the innermost (deepest) stratum basale (germinatum), followed by the stratum spinosum, stratum granulosum, stratum lucidum (when present), and ending with the outermost layer, the stratum corneum.
What are the 4 cells of the epidermis?
Cellular components. The epidermis primarily consists of keratinocytes (proliferating basal and differentiated suprabasal), which comprise 90% of its cells, but also contains melanocytes, Langerhans cells, Merkel cells, and inflammatory cells.
What is the 4th layer of the epidermis called?
Four layers of the epidermis: Stratum basale (SB), Stratum spinosum (SS), Stratum granulosum (SG), Stratum corneum (SC). There exists a thin layer of translucent cells in thick epidermis called “stratum lucidum.” It represents a transition from the SG and SC and is not usually seen in thin epidermis.
What are the five layers of the epidermis and their functions?
The 5 Layers of Your Skin
- Stratum Basale or Basal Layer. The deepest layer of the epidermis is called the stratum basale, sometimes called the stratum germinativum.
- Stratum Spinosum or the Spiny layer. This layer gives the epidermis its strength.
- Stratum Granulosum or the Granular Layer.
- Stratum Lucidum.
- Stratum Corneum.
What are the five layers of the epidermis?
The layers of the epidermis include the stratum basale (the deepest portion of the epidermis), stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum (the most superficial portion of the epidermis).
What are the 2 layers of dermis?
The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. It is made up of a thin upper layer called the papillary dermis, and a thick lower layer called the reticular dermis.
What do the 5 layers of the epidermis do?
The epidermis provides a protective waterproof barrier that also keeps pathogens at bay and regulates body temperature. The main layers of the epidermis are: stratum corneum, stratum lucidium, stratum granulosm, stratum spinosum, stratum germinativum (also called stratum basale).
What are the 2 layers of the dermis called?
The inner layer of the two main layers of the skin. The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. It is made up of a thin upper layer called the papillary dermis, and a thick lower layer called the reticular dermis.
What are 5 important components of the dermis?
specifically collagen and elastin
What is the most superficial layer of the dermis?
The epidermis (see Figures 2.2 and 2.3) is the most superficial layer of the skin and is composed of strat-ified squamous epithelium. The epidermis is sepa-rated from the dermis—the deeper layer—by the basement membrane.
How thick is the epidermis?
The epidermis is the outermost layer of the skin, and protects the body from the environment. The thickness of the epidermis varies in different types of skin; it is only .05 mm thick on the eyelids, and is 1.5 mm thick on the palms and the soles of the feet.
What are the two layers of the dermis?
The dermis is comprised of two layers: the papillary dermis and the reticular dermis. The papillary dermis is the more superficial of the two, and lies just beneath the epidermal junction. It is relatively thin and is made up of loose connective tissue, which includes: Capillaries. Elastic fibers. Reticular fibers.
What is the correct order of epidermal layers? The epidermis consists of several layers beginning with the innermost (deepest) stratum basale (germinatum), followed by the stratum spinosum, stratum granulosum, stratum lucidum (when present), and ending with the outermost layer, the stratum corneum. What are the 4 cells of the epidermis? Cellular components. The epidermis primarily…