integumentary system

• What is the integumentary system's primary function?

  First line of defense for the body
• What are the main components of the integumentary system?

  Skin, hair, nails, and associated glands
• How does the integumentary system protect the body?

  By guarding against environmental hazards
• What role does the integumentary system play in temperature regulation?

  It helps regulate body temperature
• What sensory information does the integumentary system provide?

  Touch, pressure, pain, and temperature
• What are the components of the skin?

  • Epidermis: Outermost layer, waterproof barrier
  • Dermis: Middle layer, contains connective tissue
  • Hypodermis: Deepest layer, fat and connective tissue
• What is the function of the epidermis?

  Provides a waterproof barrier and skin tone
• What specialized cells are found in the epidermis?

  Melanocytes and keratinocytes
• What do melanocytes produce?

  Melanin for pigmentation
• What is the role of keratinocytes?

  Produce keratin for strength and protection
• What does the dermis contain?

  Connective tissue, blood vessels, hair follicles
• What provides strength and elasticity to the dermis?

  Collagen and elastin fibers
• What is the hypodermis also known as?

  Subcutaneous layer
• What is the function of the hypodermis?

  Insulates the body and absorbs shocks
• What are the functions of hair in the integumentary system?

  Protection, temperature regulation, sensory perception
• Where does each hair originate?

  From a hair follicle in the dermis
• How is hair color determined?

  By the type and amount of melanin
• What is the primary function of nails?

  Protect tips of fingers and toes
• What are nails made of?

  Keratin
• Where do nails grow from?

  From the nail matrix under the cuticle
• What do sebaceous glands produce?

  Sebum that lubricates the skin
• What is the function of sweat glands?

  Regulate body temperature and excrete waste
• What are the two types of sweat glands?

  Eccrine and apocrine glands
• Where are eccrine glands found?

  All over the body
• What is the role of apocrine glands?

  Active during puberty, contribute to body odor
• What are the protective functions of the integumentary system?

  Barrier against injuries, pathogens, UV radiation
• How does the integumentary system regulate body temperature?

  Through sweating and blood vessel dilation
• What waste products does the integumentary system excrete?

  Waste products through sweat
• What vitamin does the skin synthesize?

  Vitamin D
• Why is vitamin D important?

  Essential for calcium absorption and bone health
• What does the hypodermis store?

  Lipids for energy reserves and insulation
• What are the main functions of the integumentary system?

  1. Protection against injuries and pathogens
  2. Regulation of body temperature
  3. Sensation through sensory receptors
  4. Excretion of waste products
  5. Synthesis of Vitamin D
  6. Storage of lipids