The stratum basale, the deepest layer of the epidermis, is remarkable for its role in skin regeneration and repair. It contains basal cells that continuously divide, producing new keratinocytes that migrate upward to replenish the skin's outer layers. Additionally, this layer houses melanocytes, which produce melanin for skin pigmentation, and Merkel cells, which contribute to sensory perception. Together, these components ensure the skin maintains its protective barrier and responsive qualities.
Malignant melanoma arises in the Stratum basale layer of the epidermal layer.
Stratum Basale. The cells in the Stratum Spinosum are spiny shaped and are called prickle cells. These arise during tissue preparation when the cells shrink.
a. Basal cell carcinoma arises in the basal cell layer of the epidermis. b. Malignant melanoma arises from melanocytes located in the basal layer of the epidermis. c. Squamous cell carcinoma arises in the squamous cells of the epidermis, which are found in the upper layers of the epidermis.
The major skin area from which the derivatives arise is the stratum basale, which is the deepest layer of the epidermis. This layer contains stem cells that continuously divide and differentiate to give rise to the various cell types in the epidermis, including keratinocytes, melanocytes, and Merkel cells. These cells migrate upwards through the layers of the epidermis to replenish and repair the skin.
Skin cancer doesn't arise from the stratum corneum because that layer of the epidermis is composed mainly of dead cells that do not have a blood supply for cancer cells to use. Foremost the Stratum Corneum is the top layer of the Epidermis, a cutaneous membrane. It is to be noted that the Stratum Corneum consists of 25-30 layers of non-dividing or dead cells. Therefore this environment does not accomodate the malignant cancer cells that depend on a living healthy area in which to chronically divide.
spontaneous generation
It can be hard to see the problems that may arise when there are too many things happening at once.
Spontaneous Generation
What was supposed to be meant for the idea of spontaneous generation was that living things arise from living things through REPRODUCTION!!!!!!!!!!!BY ANDY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!AND RICHARD!MY ANSWERSThe definition of spontaneous generation is the mistaken idea that living things can arise from nonliving sources.Which is impossible because you cant get something that lives from something that don't live. As if up top living things arise from living things through REPRODUCTION
What was supposed to be meant for the idea of spontaneous generation was that living things arise from living things through REPRODUCTION!!!!!!!!!!!BY ANDY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!AND RICHARD!MY ANSWERSThe definition of spontaneous generation is the mistaken idea that living things can arise from nonliving sources.Which is impossible because you cant get something that lives from something that don't live. As if up top living things arise from living things through REPRODUCTION
a. living things could arise spontaneously from other living things
Will arise (for example, I will arise).