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What are tube like pockets of epidermal cells that extend into the dermis?
Hair follicles are tube-like structures that extend from the epidermis into the dermis. They are comprised of epidermal cells and contain the hair shaft.
Where do epidermal cells get their nutrients?
Epidermal cells receive nutrients primarily through diffusion from the underlying dermis layer, where blood vessels supply nutrients. Additionally, some epidermal cells can also absorb nutrients from sweat and sebum produced by skin glands.
Where are the epidermal cells of an onion located?
The epidermal cells of an onion are located on the outermost layer of the onion bulb, forming a protective barrier.
What is the substance that helps promote mitosis in epidermal skin?
Epidermal growth factor (EGF) is the substance that helps promote mitosis in epidermal skin cells. EGF stimulates cell growth and division in the epidermis, aiding in the regeneration and repair of skin tissue.
What is the epidermal layer?
The epidermal layer is the outermost layer of the skin. It is made up of several sublayers, including the stratum corneum, which is responsible for providing protection against external factors such as bacteria and UV radiation. The epidermis also contains cells that produce melanin, giving skin its color.
Epidermal cells are supplied with nutrients from what blood cells?
Cells in the blood do not provide nutrients to the other cells of the body. The nutrients are in the blood plasma (liquid). These nutrient diffuse through the vessel wall and travel to the bodies cells in the interstitial fluid (the fluid around individual cells). The epidermis does not have blood vessel running through it, so the nutrient must pass from the dermis layer of cells.
What epidermal layer is closest to a blood supply?
The basal layer of the closest layer to blood supply. You do not have blood supply to the outer layers of the skin.
What tissue associated with the skin and underlying tissues contains many cells that fight infection What are these cells called what process do they use to rid the body of organisms?
Our skin has two layers: (1) Epidermal layer and (2) Dermal layer.Micro-organisms that penetrate through the epidermal layer is trapped in dermal layer which has WBC's, mast cells that fight antigen.Dermal layer has two parts, papillary layer and dermis. Other processes in the dermis then gets rid of any waste collected in the papillary of epidermal layer.
What cellular structures are found in the epidermal cells of humans but not in epidermal cell of leaves?
Melanocytes, which produce melanin for skin pigmentation, are found in human epidermal cells but not in leaf epidermal cells. Additionally, human epidermal cells contain structures like Langerhans cells for immune response, which are not present in leaf epidermal cells.
What does the term epidermal tissue mean?
Epidermal tissue refers to the outermost layer of cells in plants. It protects the plant from physical damage, regulates water loss, and helps in gas exchange. The epidermis also contains specialized cells like trichomes and stomata.
Do epidermal cells from petunia stain with phloroglucinol?
No, epidermal cells from petunia do not stain with phloroglucinol. Phloroglucinol is typically used to stain lignin in plant tissues, not epidermal cells. The stain mainly reacts with lignin, which is absent in the epidermal cells.
Why do the epidermal cells have had there edges folded over?
The folds on epidermal cells, called microvilli, increase the cell's surface area for absorption and secretion. This increased surface area allows for more efficient exchange of molecules such as nutrients and waste products with the external environment.
