Question

Which epidermal layer is often called the spiny layer?

A) Stratum corneum
B) Stratum lucidum
C) Stratum granulosum
D) Stratum spinosum

Answer 1

The epidermal layer often called the spiny layer is the Stratum spinosum, which is composed of 8 to 10 layers of keratinocytes formed in the stratum basale.

Step-by-step explanation:

The epidermal layer often called the spiny layer is the Stratum spinosum.

The stratum spinosum is composed of 8 to 10 layers of keratinocytes, which are formed as a result of cell division in the stratum basale. This layer appears spiny due to the protruding cell processes that join the cells via a structure called a desmosome.

Interspersed among the keratinocytes of the stratum spinosum are Langerhans cells, which function as macrophages by engulfing foreign particles and damaged cells.