What are the strata of the epidermis?
The epidermis consists of 5 histologic strata. From superficial to deep these layers are the (1) stratum corneum, (2) stratum lucidum, (3) stratum granulosum, (4) stratum spinosum, and (5) stratum germinativum.
What are the 4 cell types and functions found in the epidermis?
A. Epidermis
- Keratinocytes (skin cells)
- Melanocytes (pigment-producing cells)
- Langerhans cells (immune cells).
How many strata does the epidermis have?
five
The epidermis includes five main layers: the stratum corneum, stratum lucidium, stratum granulosum, stratum spinosum, and stratum germinativum.
What is in the epidermis layer?
The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.
What are the 5 strata?
This jingle lists the 5 layers of the epidermis of the skin, from innermost to outermost: stratum basale, stratuum spinosum, stratum granulosum, stratum lucidum (for thick skin only), and stratum corneum. These layers are all considered epithelial tissue.
Which layer of the epidermis is closest to the surface?
stratum basale
The stratum basale, also called the stratum germinativum, is the basal (base) layer of the epidermis. It is the layer that’s closest to the blood supply lying underneath the epidermis.
What is the outermost layer of the epidermis called?
stratum corneum
The epidermis is the thin outer layer of the skin. It consists of 3 types of cells: Squamous cells. The outermost layer is continuously shed is called the stratum corneum.
What is the deepest layer of the epidermis?
Stratum Basale. The stratum basale (also called the stratum germinativum) is the deepest epidermal layer and attaches the epidermis to the basal lamina, below which lie the layers of the dermis. The cells in the stratum basale bond to the dermis via intertwining collagen fibers, referred to as the basement membrane.
What are the layers of the epidermis?
The epidermis of thick skin has five layers. Beginning at the basal lamina and traveling superficially toward the epithelial surface, we find the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
What is the depth of the epidermis?
The thickness of the epidermis varies depending on where on the body it is located. It is at its thinnest on the eyelids, measuring just half a millimeter, and at its thickest on the palms and soles at 1.5 millimeters.
