What is the epidermal layer of protection?
The top layer of the epidermis. This is the layer of the epidermis that you see. In the stratum corneum, keratinocytes become corneocytes (corn-ee-o-site). Corneocytes are strong, dead keratinocytes, and they protect you from harm, including abrasions, light, heat and pathogens.
What is the most protective layer of the epidermis?
Stratum corneum Stratum corneum is the outermost layer of the epidermis. It consists of 10 to 30 layers of dead keratinocytes that are constantly being shed.
Which layer of the epidermis will be supplied with the highest level of oxygen from the blood quizlet?
Which layer of the epidermis will be supplied with the highest levels of oxygen from the blood? Stratum Basale.
Which of the following layers of epidermis is mainly responsible for cell division and replacement?
Stratum basale, the layer that contains the mitotic viable cells of the epidermis. 4.
What is stratum basale?
Stratum basale, also known as stratum germinativum, is the deepest layer, separated from the dermis by the basement membrane (basal lamina) and attached to the basement membrane by hemidesmosomes.
What is stratum spinosum?
Stratum spinosum, 8-10 cell layers, also known as the prickle cell layer contains irregular, polyhedral cells with cytoplasmic processes, sometimes called “spines”, that extend outward and contact neighboring cells by desmosomes. Dendritic cells can be found in this layer.
What is stratum lucidum?
Stratum lucidum, 2-3 cell layers, present in thicker skin found in the palms and soles, is a thin clear layer consisting of eleidin which is a transformation product of keratohyalin.
What is papillary layer of dermis?
Listen to pronunciation. (PA-pih-LAYR-ee DER-mis) The thin top layer of the dermis (the inner layer of the skin). The papillary dermis has connective tissue and blood vessels that give nutrients to the epidermis (the outer layer of the skin) and that help control the temperature of the skin.
Where is the papillary layer located?
Papillary dermis: The papillary layer is the top layer of your dermis. It's much thinner than the reticular dermis. It consists of collagen fibers, fibroblast cells, fat cells, blood vessels (capillary loops), nerve fibers, touch receptors (Meissner corpuscles) and cells that fight bacteria (phagocytes).
What is the stratum spinosum?
Stratum spinosum, 8-10 cell layers, also known as the prickle cell layer contains irregular, polyhedral cells with cytoplasmic processes, sometimes called “spines”, that extend outward and contact neighboring cells by desmosomes. Dendritic cells can be found in this layer.
What is the papillary layer?
(PA-pih-LAYR-ee DER-mis) The thin top layer of the dermis (the inner layer of the skin). The papillary dermis has connective tissue and blood vessels that give nutrients to the epidermis (the outer layer of the skin) and that help control the temperature of the skin.
What is a basal layer?
The basal layer is the innermost layer of the epidermis, and contains small round cells called basal cells. The basal cells continually divide, and new cells constantly push older ones up toward the surface of the skin, where they are eventually shed.
What is Stratum Spinosum?
Stratum spinosum, 8-10 cell layers, also known as the prickle cell layer contains irregular, polyhedral cells with cytoplasmic processes, sometimes called “spines”, that extend outward and contact neighboring cells by desmosomes. Dendritic cells can be found in this layer.
What is papillary layer?
(PA-pih-LAYR-ee DER-mis) The thin top layer of the dermis (the inner layer of the skin). The papillary dermis has connective tissue and blood vessels that give nutrients to the epidermis (the outer layer of the skin) and that help control the temperature of the skin.
What is papillary and reticular layer?
The papillary dermis is the superficial layer, lying deep to the epidermis. The papillary dermis is composed of loose connective tissue that is highly vascular. The reticular layer is the deep layer, forming a thick layer of dense connective tissue that constitutes the bulk of the dermis.
What is the stratum Reticulare?
Beneath the stratum papillare is located the stratum reticulare. This layer is mainly formed of coarse collagen fibers arranged irregularly and a small number of elastic fibers. The reticular layer also contains adipocytes, melanocytes, mast cells, nerve fibers and small blood vessels (Fig. 16-3).
What is the function of Germinative layer of epidermis?
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 is Germinative layer?
Medical Definition of germinative layer : the innermost layer of the epidermis from which new tissue is constantly formed.
What are Germinative cells?
Germinative cells, small cell masses attached to the stalks of dermal papillae that are able to differentiate into the hair shaft and inner root sheath, form follicular bulb-like structures when co-cultured with dermal papilla cells.
What is Germinative layer of epidermis?
Medical Definition of germinative layer : the innermost layer of the epidermis from which new tissue is constantly formed.
Where is Germinative layer found?
The stratum germinativum is the layer of the epidermis that is closest to the basement membrane, which is a thin sheet of fibers between the epidermis and the dermis. Above the stratum germinativum is the stratum spinosum.