Lec. 2 Integumentary Sys

Question 1

Layers of skin

Answer 1

2 layers:
EPIDERMIS
- (thin, superficial, epithelial tissue)
- (densely packed cells - keratinocytes, langerhan, merkel, melanocytes)
DERMIS
- (thick, deeper, connective tissue)
- (few cells, mainly connective tissue)

Question 2

Layers of the Epidermis

Answer 2

Deep —> superficial
- Stratum Basale 
(Deepest -stem cells for keratinocytes)
- Stratum Spinosum
- Stratum Granulosum
(Increased production of keratin - causes cell death [keratinocytes]
- Stratum Lucidum
- Stratum Corneum 
(Most superficial)

Question 3

Layers of Dermis

Answer 3

• Papillary region
  (Superficial portion)
• Reticular region
  (Thicker deep portion - elasticity of skin)