what is the epidermis?

Answer 1

epidermis is the outer most layer of skin, it forms the waterproof outer wrap over the body's surface. The outer most layer of epidermis consists of 25-30 layers of dead cells.

Answer 2

the skin is the simplest terms, the first layer of defencse your body has when your body has when it comes in contact with a harmful virus

Epidermis is the outermost layer of the skin. It forms the waterproof, protective wrap over the body's surface and is made up of stratified squamous epithelium with an underlying basal lamina.
[edit]Components

It contains no blood vessels, and is nourished by diffusion from the dermis. The main type of cells which make up the epidermis are keratinocytes, melanocytes, Langerhans cells and Merkels cellss.
[edit]Layers

Epidermis is divided into several layers where cells are formed through mitosis at the innermost layers. They move up the strata changing shape and composition as they differentiate and become filled with keratin. They eventually reach the top layer called stratum corneum and become sloughed off, or desquamated. This process is called keratinization and takes place within weeks. The outermost layer of Epidermis consists of 25 to 30 layers of dead cells.
Epidermis is divided into the following 5 sublayers or strata:
Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum germinativum (also called "stratum basale")

Answer 3

The epidermis is the superficial layer of skin. Beneath is lie the dermis and then the subcutaneous. The epidermis is manly responsible for protection and provides us with karitenized cells that protect our internal system from abrasions and all sorts of injuries.

Answer 4

The epidermis (pluralized either epidermises or sometimes epidermes) is the outer single-layered group of cells covering a plant, especially the leaf and young tissues of a vascular plant including stems and roots. Epidermis and periderm are the dermal tissues in vascular plants. The epidermis forms the boundary between the plant and the external world. The epidermis serves several functions: protection against water loss, regulation of gas exchange, secretion of metabolic compounds, and (especially in roots) absorption of water and mineral nutrients. The epidermis of most leaves shows dorsoventral anatomy: the upper (adaxial) and lower (abaxial) surfaces have somewhat different construction and may serve different functions.

The epidermis is usually transparent (epidermal cells lack chloroplasts) and coated on the outer side with a waxy cuticle that prevents water loss. The cuticle may be thinner on the lower leaf epidermis than on the upper epidermis; and is thicker on leaves from dry climates as compared with those from wet climates.

The epidermal tissue includes several differentiated cell types: epidermal cells, guard cells, subsidiary cells, and epidermal hairs (trichomes). The epidermal cells are the most numerous, largest, and least specialized. These are typically more elongated in the leaves of monocots than in those of dicots.

The leaf and stem epidermis is covered with pores called stomata (sing., stoma), part of a stoma complex consisting of a pore surrounded on each side by chloroplast-containing guard cells, and two to four subsidiary cells that lack chloroplasts. The stoma complex regulates the exchange of gases and water vapor between the outside air and the interior of the leaf. Typically, the stomata are more numerous over the abaxial (lower) epidermis of the leaf than the (adaxial) upper epidermis. An exception is floating leaves where most or all stomata are on the upper surface. Vertical leaves, such as those of many grasses, often have roughly equal numbers of stomata on both surfaces. The number of stomata varies from a about 1,000 to over 100,000 per square centimeter of leaf surface.

Trichomes or hairs grow out from the epidermis in many species. In root epidermis, epidermal hairs, termed root hairs are common and are specialized for absorption of water and mineral nutrients.

In plants with secondary growth, the epidermis of roots and stems is usually replaced by a periderm through the action of a cork cambium.

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Answer 5

A layer of cells present over the dermis is called epidermis.

Answer 6

Epidermis is the outer layer of your skin. It's the part you can see.

Answer 7

It's top skin.
Skin comes in layers. Epidermis is the first layer.
The visible part.

Answer 8

Like everyone said, the skin. But, ...plants have no epidermis. But they have an endodermis. It is the innermost layer of the cortex of a root surrounding the vascular cylinder in all vascular plants

Answer 9

the epidermis is the superficial cell layer. generally the bit you can see, but remember this may be transparrent, so a better definition is the bit you can touch on the outside in a healthy specimen.

Answer 10

epidermis is the outer most layer's of the skin