What is the difference between epithelium and epidermis?

Answer 1

The Epidermis is a type of epithelium tissue.

Epithelium a type of tissue (the others being Muscle, Connective and Nervous) that lines internal and external surfaces. They are typically thin sheets of cells that have a range of functions such as: separating parts of the body, lining organs (like the lungs) and generally protecting your body (e.g. The skin - including the epidermis - protects the inside of your body from external dangers).

"Epidermis" can also have connotations of plant tissue. In this context, epidermis refers to the outer layer of cells covering the exterior areas of a plant (stem, leaves, flowers and roots). This helps to protect against water loss, it provides a physical barrier against pathogens and pests and it aids gas transfer and water/mineral ion absorption in roots. The epidermis in a plant is often transparent as well so that light can travel through to the lower layers of plant tissue for photosynthesis.
(Thank you Indrani R for your help with this!)

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Answer 2

Epithelium is a type of tissue that covers the surfaces of organs, vessels, and cavities in the body. It consists of tightly packed cells that form a protective barrier. Epidermis, on the other hand, is the outermost layer of the skin. It is a type of epithelial tissue that protects the body from the external environment.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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