Integumentary System

Question 1

Epidermis

Answer 1

• Composition: Dead skin cells
• Thickness: As thin as a piece of paper
• Function: Forms a protective barrier, prevents bacterial entry, and blocks UV rays
• Sensitivity: Lacks blood vessels and nerves but sensitive to touch due to receptors below

Question 2

Dermis

Answer 2

• Location: Beneath the epidermis
• Characteristics: Living skin with structures like glands, blood vessels, nerves, and hair follicles

Question 3

Subcutaneous/Hypodermis

Answer 3

• Function: Fat layer protecting organs and insulating the body

Question 4

Sebaceous Glands

Answer 4

• Location: Everywhere except palms and soles
• Purpose:
  1. Antibacterial Action: Sebum kills skin bacteria
  1. Moisturization: Sebum moisturizes skin and hair
• Structure:
• Ducts: Tubes from glands to skin
• Pores: Open and close
• Distribution:
• Scalp: Abundant to prevent dry hair
• Face: Combat bacteria

Question 5

Sudoriferous Glands

Answer 5

• Location: All over, concentrated in armpits, palms, and soles
• Purpose:
  1. Cooling: Sweat cools through evaporation.
  1. Cleansing: Sweating washes away debris
• Structure:
• Ducts: Tubes to skin
• Pores: Stay open
• Concentration:
• Armpits, Palms, Soles: Concentrated areas