Function/Purpose of Skin + Epidermis v Dermis

functions of the skin

protection from

1. mechanical damage

2. chemical damage

3. bacterial damage

4. UV radiation

5. Thermal (heat/cold) damage

6. Desiccation (drying out)

aids in homeostasis - body heat loss or heat retention

aids in excretion of urea and uric acid

(perspiration)

synthesizes vitamin D

epidermis

outer layer of skin

dermis

second layer of skin

epidermis has ___ layers

5

dermis has ___ layers

2

Papillary layer

superficial layer of dermis

Reticular layer

deep layer of dermis

dermal papillae

projections on the papillary layer that indent the epidermis

pain/touch receptors

papillary layer

blood vessels

reticular layer

Sweat (sudoriferous) gland

reticular layer

oil (sebaceous) gland

reticular layer

deep pressure receptors

reticular layer

phagocytes

reticular layer