Intergumentary system structure and functions (basics)

this is equivalent to 10/02/26 slide deck

What is the integumentary system composed of? (5 things)

Skin, hair, receptors, glands, blood vessels

Functions of integumentary system?

Protection, temperature regulation, sensation, vitamin D synthesis, immune response.

What does the integumentary system protect us from?

• Physical damage

• Chemical damage

• Bacterial damage

• Thermal (heat) damage

• Ultraviolet radiation

Desiccation (drying out)

3 layers of the skin

Epidermis, Dermis, Hypodermis

What is the epidermis composed of?

Stratified squamous epithelium

How long does it take for the epidermis to be filled with Keratin

4-6 weeks

Layers of the epidermis

Stratum corneum

Stratum lucidum

Stratum granulosum

Stratum spinosum

Stratum germinativum (basale)

Epidermis special cells?

Melanocytes-make melanin

Langerhans cells-inmune

Merkel cells-mechanoreceptors

Keratinocytes- produce Keratin/Synthesize vitamin D

What is the Dermis layer composed of?

Dense and Loose connective tissue

Structure of the Dermis

Papillary layer

Reticular layer

What is the Hypodermis composed of?

Adipose (fat) tissue aka loose connective tissue