Stratum germinativum, also called stratum basale or basal cell layer.
The Bascal Cell Layer, the deepest layer where cells divide to produce new skin cells.
dermis
skin
epidermis
macrophages called epidermal dendritic cells
Actually it is not that difficult for the skin to repair itself when only the epidermis is damaged. It's when the dermis is injured that the process becomes more complicated. It is difficult to only injure the epidermis, but it happens. The epidermis is avascular, meaning it does not contain blood vessels and therefore does not bleed. Epidermal wounds usually involve only minor damage to the superficial epidermal cells although the center of the wound could extend slightly into the dermis. These types of wounds include minor skin abrasions, where a portion of the skin has been scraped away, and minor burns. In response to an epidermal injury, basal cells from the deepest layer of the epidermis --the stratum basale-- surrounding the wound break off from the basement membrane (epidermal-dermal junction). The cells then enlarge and migrate across the wound. The cells continue to migrate until they meet cells migrating from the opposite side of the wound. Migration of the cells stops when each cell is finally in contact with other epidermal cells on all sides. As the basal epidermal cells migrate, a hormone called epidermal growth factor stimulates basal cells to divide and replace those who have left to fill in the wound. The relocated basal epidermis cells divide to build new strata, thus thickening the new epidermis. Viola, the skin is repaired! (Information used from the text book: Principles of Anatomy and Physiology)
the stem cells of the stratum basale are in constant state of mitosis, replacing cells that have rubbed off the epidermal surface. as they are produced by stem cells, new keratinocytes push previously formed cells toward the surface.
Mitosis is the process that produces new 2N cells from 2N cells Meiosis is the process that produces 1N reproductive cells.
They originate in the deepest layer of epidermis, called stratum basale. The columnar cells of this deep layer are constantly dividing to produce new cells that move outward to undergo metamorphosis at different levels.
Yes, the oldest epidermal cells are found in the stratum basale. This layer, also known as the basal layer, is the deepest layer of the epidermis and is responsible for the continuous production of new cells. As cells are pushed upwards, they become older and eventually reach the outermost layer of the epidermis, the stratum corneum, where they are shed.
The Bascal Cell Layer, the deepest layer where cells divide to produce new skin cells.
The cells on the epidermis have definite life cycle. Each epidermal cell begins life deep in the epidermis, where cells divide to form new cells. The new cells gradually mature and move upwards in the epidermis as new cells form beneath them. After about two weeks, the cells die and become part of the surface layer of the epidermis. Hope this helps!!
macrophages called epidermal dendritic cells
Connective Tissue
Well when the matrix cells above the dermal papilla in the hair follicle become hair cells it is called "differentiation." They then become keratinized and are pushed up. Hope this helps.
Every day, new cells form in the bottom layer of the epidermis.when cells die they gotta be replaced.Joseph
I believe it is Meiosis that produces new cells with each having half as many chromosomes as the original parent cells.
Actually it is not that difficult for the skin to repair itself when only the epidermis is damaged. It's when the dermis is injured that the process becomes more complicated. It is difficult to only injure the epidermis, but it happens. The epidermis is avascular, meaning it does not contain blood vessels and therefore does not bleed. Epidermal wounds usually involve only minor damage to the superficial epidermal cells although the center of the wound could extend slightly into the dermis. These types of wounds include minor skin abrasions, where a portion of the skin has been scraped away, and minor burns. In response to an epidermal injury, basal cells from the deepest layer of the epidermis --the stratum basale-- surrounding the wound break off from the basement membrane (epidermal-dermal junction). The cells then enlarge and migrate across the wound. The cells continue to migrate until they meet cells migrating from the opposite side of the wound. Migration of the cells stops when each cell is finally in contact with other epidermal cells on all sides. As the basal epidermal cells migrate, a hormone called epidermal growth factor stimulates basal cells to divide and replace those who have left to fill in the wound. The relocated basal epidermis cells divide to build new strata, thus thickening the new epidermis. Viola, the skin is repaired! (Information used from the text book: Principles of Anatomy and Physiology)
cambium
meristem
the stem cells of the stratum basale are in constant state of mitosis, replacing cells that have rubbed off the epidermal surface. as they are produced by stem cells, new keratinocytes push previously formed cells toward the surface.