Exploring the Layers of Human Skin

The video explores the skin's structure and functions, detailing its three layers: epidermis, dermis, and hypodermis. It explains how the skin protects the body, regulates temperature, and heals itself. The epidermis acts as a protective barrier, the dermis provides elasticity and sensation, and the hypodermis stores fat for energy and cushioning. The video also covers the skin's immune response and regeneration process.

What are the three layers of the skin?

• Cutis, Subcutis, Superficialis

• Epidermis, Dermis, Hypodermis

• Cortex, Medulla, Cuticle

• Stratum, Basal, Follicle

What substance in the epidermis makes hair and nails strong?

• Elastin

• Collagen

• Melanin

• Keratin

How often are the cells in the epidermis completely replaced?

• Every 7-9 weeks

• Every 4-6 weeks

• Every 10-12 weeks

• Every 2-3 weeks

What causes the skin to tan?

• Exposure to cold

• Production of melanin

• Lack of hydration

• Eating certain foods

Which layer of the skin is the thickest?

• Epidermis

• Stratum

• Dermis

• Hypodermis

What makes the skin elastic and stretchable?

• Keratin and melanin

• Lymphocytes and macrophages

• Collagen and elastin

• Fibroblasts and phagocytes

Why can't you tickle yourself?

• The brain anticipates the touch and reduces sensitivity

• The brain increases sensitivity

• Nerve receptors are inactive

• The skin is less sensitive to self-touch

What role does fat play in the hypodermis?

• It produces melanin

• It increases skin sensitivity

• It acts as fuel and protection

• It helps in the production of keratin

What happens when a bacterium penetrates all skin layers?

• It causes immediate infection

• It strengthens the skin's immunity

• It becomes part of the skin flora

• Macrophages destroy it

How does scar tissue differ from ordinary skin tissue?

• It has parallel fibers for faster repair

• It is less elastic

• It has more melanin

• It contains more fat cells