Lecture Notes: The Skin (Integumentary System)

Introduction

• Presenter: Dr. Mike
• Topic: Overview of the skin, also known as the integumentary system.
• Purpose: Understand the structure and roles of the skin.

Structure of the Skin

Layers of the Skin

1. Epidermis:

   • The topmost, external layer visible to the eye.
   • "Epi" means "on top of".

2. Dermis:

   • Layer beneath the epidermis.

3. Hypodermis (Subcutaneous layer):

   • Layer beneath the dermis.
   • "Hypo" means "under".

Functions and Composition of the Epidermis

• Cell Types in the Epidermis:
  • Predominantly made up of squamous cells.
  • Cells contain keratin, a protein that provides toughness and waterproof properties to the skin.

Conclusion

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Additional Notes

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• Emphasis on the durable and waterproof nature of the skin due to its keratin content.