Skin

This tutorial explores the histology of skin, detailing its layers, types, and functions. It covers the epidermis, dermis, and hypodermis, explaining the roles of various cells like keratinocytes and melanocytes. The video also compares thick and thin skin, discusses accessory structures such as glands and nerves, and highlights a clinical scenario involving melanoma. The tutorial concludes with a summary of the skin's protective, regulatory, and sensory functions.

What is the primary function of the skin?

• To aid in digestion

• To store energy

• To protect internal organs

• To produce hormones

Which layer of the skin is the outermost?

• Subcutaneous tissue

• Epidermis

• Hypodermis

• Dermis

What is the main cell type found in the epidermis?

• Macrophages

• Adipocytes

• Keratinocytes

• Fibroblasts

Which layer of the dermis is responsible for forming ridges under the epidermis?

• Stratum corneum

• Stratum papillare

• Stratum basale

• Stratum reticulare

What is the primary component of the hypodermis?

• Melanin

• Keratin

• Collagen fibers

• Adipose tissue

Where is thick skin typically found on the body?

• Back

• Soles of the feet

• Scalp

• Abdomen

Which cell type is responsible for producing melanin?

• Basal cells

• Langerhans' cells

• Keratinocytes

• Melanocytes

What is the function of sebaceous glands?

• To secrete sebum

• To produce sweat

• To store fat

• To detect touch

Which nerve ending is responsible for detecting vibration?

• Pacinian corpuscles

• Meissner's corpuscles

• Merkel cells

• Ruffini's corpuscles

What type of skin cancer involves uncontrolled growth of melanocytes?

• Basal cell carcinoma

• Squamous cell carcinoma

• Lymphoma

• Melanoma