Lab 4: Integumentary

Question 1

What are the three layers of the integument? What are the important strata?

Answer 1

1. Epidermis
   
   • Stratum corneum
   • Stratum lucidum
   • Stratum granulosum
   • Stratum spinosum
   • Stratum basale
2. Dermis
   
   • Papillary layer
     
     • Dermal papillae
   • Reticular layer
3. Hypodermis
   
   • NOT a part of integument but included due to close involvement in structure and function

Question 2

What are identifying features of the different strata of epidermis?

Answer 2

Stratum corneum
- A thick stratified layer of dead keratinocytes
Stratum lucidum
- 1-2 layers of cells undergoing keratinization
Stratum granulosum
- Dark band of cells lining the lucidum and spinosum
Stratum spinosum
- The dense layer of living keratinocytes
Stratum basale
- The basement membrane

Question 3

What are identifying features of the dermis?

Answer 3

Papillary layer
- Dermal papillae is the connective tissue layer below the epidermal ridges
Reticular layer
- Has dense irregular layer of collagen fibers

Question 4

What are the 9 accessory structures in this image?

Answer 4

Question 5

Label the 7 points on this slide

Answer 5

Question 6

Label the 5 points on this slide

Answer 6