Question

In the given diagram, parts labelled as 'a','b','c','d' and 'e' respectively represent

• A. Stratum granulosum, sweat gland, stratum germinativum, sebaceous gland and stratum corneum
• B. Stratum granulosum, sebaceous gland, stratum germinativum, sweat gland and stratum corneum
• C. Stratum germinativum, sweat gland, stratum lucidum, sebaceous gland and stratum corneum
• D. Stratum corneum, sweat gland, stratum lucidum, sebaceous gland, stratum germinativum
• E. Stratum germinativum, sebaceous gland, stratum lucidum, sweat gland and stratum corneum

Answer 1

The correct option is E Stratum germinativum, sebaceous gland, stratum lucidum, sweat gland and stratum corneum

Skin is divided into three main layers: epidermis, dermis and hypodermis.

1. The epidermis is the outermost protective layer of skin which is further divided into 7 layers.

Stratum corneum is the uppermost dead layer of skin which is continuously shed at regular intervals which are represented in the figure as 'e'.

Stratum lucidum is the second layer from top found in the palms of the hand, fingertips and soles of feet and is represented in the figure as 'c'.

Stratum granulosum is the third layer of skin where keratin production takes place.

Stratum spinosum gives strength and flexibility to the skin.

Stratum basale or stratum germinativum is the lowermost layer of the epidermis which forms keratinocytes and determines the colour of skin and protects the skin from harmful UV rays. This layer is represented in the figure as 'a'.

Dermis lies underneath the epidermis and is rich in blood vessels which nourishes the skin. and contains hair follicles, sweat glands and sebaceous glands.

Sweat glands are coiled tubular glands which pass their secretion to the surface and are shown as d' in the figure.

Sebaceous glands are shown as 'b' and are the invaginations of skin which are attached to hair follicles and secreted oily secretion called sebum.

Thus, the correct answer is option E.