Question

ASSERTION (A)- Surface of skin is impervious to water.
REASON(R)- Surface of skin is covered by stratified cuboidal epithelium.
A) Both A and Rare true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A.
C). A is true but R is false,
D) Both A and Rare false,​

Answer 1

Explanation:

If the assertion is false but reason is true. Solution : Surface of skin is impervious to water because it is covered by stratified keratinised squamous epithelium. ... Heavy deposits of the insoluble protein keratin are present in the dead superficial layers which makes this epithelium impervious to water. Hope it helps You

Answer 2

Both A and R are true and R is the correct explanation of A. (OPTION B)

HUMAN SKIN -

• Skin is the largest organ of the body composed of three layers namely epithelium, dermis, and hypodermis.
• The outermost layer in the epidermis is known as the stratum corneum containing dead cells followed by lucidum, granulosum, spinosum, and basal layer.

• Epithelium layer act as a physical barrier between the human body and the surrounding.

• The Epithelium layer is the uppermost layer consisting of dead cells of keratin known as keratinocytes.
• It also consists of melanin cells that provide skin tone to our body based on the concentration of melanin pigment.
• The keratin cells make skin impervious to water and maintain body temperature.
• The upper layer contains pores for the escape of oil and sweat from the body.