We skin cells are made, they are made in the deep layers of the skin, the dermal layer. This layer of the skin has blood supply, and cells that are in the dermal layer stay alive just fine. However, as cells in the upper layer, the epidermis, die; the skin cells in the dermal layer gets, pushed up into the epidermal layer. In this layer of the skin, there is no blood supply. However, nutrients are still passed from the blood rich dermal cells to the epidermal cells. The problem occurs when the epidermal cell is pushed right to the top of the epidermal layer, where there is no blood supply and it is too far away from the dermal layer to get nutrients vie osmosis. The cells in the upper epidermis get no nutrients and therefore die. Epidermal cells also die, ironically, because of the substances that they produce, keratin. Keratin is secreted by all skin cells to make the skin tough, durable and waterproof. However the build up of this keratin in the cell, leaks out in the extracellular space (the area outside the cell) and starts to breakdown the membranes of the cells around them and the cells essentially end up killing each other.
Epidermal cells die because of the loss of nutrient supply as they get closer and closer to the surface of the skin, and the buildup of keratin inside them that leaks out into the area outside the cells.
Read more: Why_do_epidermal_cells_die
age and external environment
A) External environment
B) Age
Age and external environment
oesinophilic cells - cytoplasm filled with keratin filaments No nucleus. No organelles. Thick plasma membrane eg: stratum corneum (the most superficial layer of epidermis) Hope that helps. you can thanks me later.
Poor farming methods and natural droughts are the factors that caused the dust bowel.
There are no natural factors that scientists think are causing the present climate change. It is now clear that global warming is caused by deforestation and the burning of fossil fuels (coal, oil and natural gas).
natural disaster
Birth, and in-migration.-Dae*
A) External environmentB) Age
I think it would be down to earth or Natural I think natural is the best word to describe it
It sticks to the natural oils that are released from the epidermis.
The natural oil of the skin, called sebum. Sebum is produced in the dermis (the second layer of skin, below the epidermis), and rises to the surface of the epidermis, making the skin waterproof.
What are the factors affecting natural vegetation
parasites predation weather and clement are four ways natural factors can change a populations size.
on account of its natural resources.
your mum is the answer to the question
how relief affects natural vegetation?
There are many products and services provided by the website Natural Factors. Some of their products they sell are all natural vitamins, minerals and nutritional supplements.
Factors: elasticity and shape of the object
4? the factors of 4 are 1,4 and 2