The-Integumentary-System-Your-Bodys-Protective-Shield Flashcards
(28 cards)
What is the integumentary system?
The body’s largest and most vital organ system
What are the primary functions of the skin?
Barrier against pathogens, UV radiation, and injury
What are the three layers of the skin?
- Epidermis
- Dermis
- Hypodermis
What is the outermost layer of the skin called?
Epidermis
What type of cells are primarily found in the epidermis?
Keratinocytes
What do melanocytes produce?
Melanin
What is the deepest layer of the epidermis?
Stratum Basale
What is the outermost layer of the epidermis composed of?
Dead keratinocytes
What are the five layers of the epidermis?
- Stratum Basale
- Stratum Spinosum
- Stratum Granulosum
- Stratum Lucidum
- Stratum Corneum
What provides structural support and flexibility in the skin?
Dermis
What two types of fibers are found in the dermis?
- Collagen
- Elastin
What are the two layers of the dermis?
- Papillary Layer
- Reticular Layer
What is the primary composition of the hypodermis?
Adipose tissue
What are the functions of adipose tissue in the hypodermis?
- Insulation
- Cushioning
- Energy reserve
What pigments determine skin color?
- Melanin
- Carotene
- Hemoglobin
What is the growth cycle of hair?
- Anagen (growth)
- Catagen (regression)
- Telogen (resting)
Where do nails grow from?
Nail matrix
What are the two types of sweat glands?
- Eccrine
- Apocrine
What is the function of eccrine glands?
Produce clear sweat that helps cool the body
What do sebaceous glands produce?
Sebum
What is the primary role of sebum?
Lubricates the skin and hair
What role does the skin play in thermoregulation?
Maintaining stable body temperature
What are the sensory functions of the skin?
- Touch
- Pressure
- Temperature
- Pain
What is synthesized in the skin when exposed to sunlight?
Vitamin D
