Stratum Basale

• base layer
• cells divide

• desmosomes form (strength)
• some division

• Cells fill with karatin 

• clear layer
• thin layer
• cells are dying (lose nucleus) (apoptosis)

• Dead cells

• part of the immune system
• have branches that grab bacteria

• make melanin which blocks/absorbs UV light
• melanoma= cancer of the melanocytes= deadly

• calcium uptake in diet
• exposure to the sun= ^ in calcium

1. epidermis
2. dermis
3. hypodermis

• connective tissue proper
• contains fibroblasts, white blood cells, other structures
• has 2 layers

1. Papillary- papilla (bumps)= more absorption of nutrients, loose CTP
2. Reticular- dense CTP

adipose tissue

insulating

protective

• Found in the throat, vagina, mouth, nose
• keep out infection, allows passage of substances, funciton depends on location
• cilia is also found with mucus

• digestion and lubrication in the form of saliva

• stratified squamous
• lubrication, normal flora (protective bacteria)

• digestion and lubrication in the form of saliva

• traps pathogens

skin gets thinner

can damage easier

they get cold easier

temp control