Question

The outer layer of the skin is called as
A. Dermis
B. Epidermis
C. Plasma
D. Cortex

Answer 1

Hint: Skin is the largest organ of the body. It helps in regulating body temperature, and allows the sensations of heat, cold, and touch. The skin protects us from foreign microbes and elements.

Complete answer:
A. Dermis- Dermis is the innermost layer of the skin, containing connective tissue, oil glands, sweat glands, blood vessels, nerves, etc. The primary function of the dermis is to support and protect the skin, deeper layers and helps in regulation, and aids in sensation.
B. Epidermis- Epidermis is the outermost layer of the skin; this layer provides a waterproof barrier and maintains the tone of the skin. The skin tone or color is created by the specialized cells known as melanocytes which produce the pigment melanin. These melanocytes cells are present in the epidermis, and beneath the epidermis, the dermis layer is located.
C. Plasma- Plasma is a light yellow liquid when it is separated from the rest of the blood. It carries salts, water, and enzymes. The primary function of the plasma is to transport blood cells throughout the body with nutrients, antibodies, waste products, and chemical messengers like hormones.
D. Cortex- Cortex is the superficial or outermost layer of the organ. Such organs with well-defined cortical layers are kidneys, adrenal glands, ovaries, portions of the brain, etc.

Hence, the correct answer is option (B).

Note: Skin protects from various harmful microorganisms infection on our skin such as bacteria, virus, and other infectious agents. The epidermis is mainly made up of flat, scale-like cells known as squamous cells.