What is the stratum of the epidermis?

What is the stratum 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 is called stratum?

Your sternum is a bone that’s located in the middle of your chest. It’s also sometimes referred to as the breastbone. Your sternum protects the organs of your torso from injury and also serves as a connection point for other bones and muscles.

What are stratum cells?

The stratum basale is a single row of columnar or cuboidal cells resting on the basement membrane zone that separates the epidermis from the dermis (see Fig. 1-5). Most of these cells are keratinocytes that are constantly reproducing and pushing upward to replenish the epidermal cells above.

What are the cells of the epidermis called?

The epidermis has three main types of cell: Keratinocytes (skin cells) Melanocytes (pigment-producing cells) Langerhans cells (immune cells).

What is the main function of stratum basale?

The two primary functions of the stratum basale are 1) proliferation and 2) attachment of the epidermis to the dermis. Cells of the stratum basale essentially represent germinal cells (“brick generators”) responsible for the generation of all cells of the epidermis.

What is the main function of stratum germinativum?

The stratum germinativum is a Latin term, which translates to germinative layer. This layer is composed of germinative (or basal) keratinocytes. These cells are actively dividing to provide new cells to replenish lost skin from normal shedding.

What does epidermis contain?

The epidermis of the skin is a constantly renewing stratified squamous epithelium. It consists mostly of keratinocytes, but also of Langerhans cells, melanocytes, and Merkel cells resting on a supporting dermis that contains the nerve and vascular networks, which nourish the epidermis.

What is the main function of epidermis?

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.

What are the functions of the 5 layers of the epidermis?

Key Points

• 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 is Germinative layer?

The innermost layer of the epidermis, consisting of a basal layer of cells and a layer of prickle cells (stratum spinosum).

What are the layers of skin called?

Epidermis. Dermis. Subcutaneous fat layer (hypodermis)