Integumentary System - Epidermis

6 important questions on Integumentary System - Epidermis

What are the five layers of the epidermis (from deep to superficial)?

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), stratum corneum.

What happens in the stratum basale?

Continuous cell division occurs, which produces all the other layers

What characterizes the stratum spinosum?

They have keratinocytes on them, which makes the cells appear to have little spines.
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What happens in the stratum coroneum?

Dead keratinocytes that are continually shedding and that are replaced by cells from deeper strata

What is special about the stratum lucidum?

Found only in thick skin

What happens in the stratum granulosum?

Keratinocytes die, nuclei and organelles disintegrate.

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