1. 5.1 Notes  To keep your teeth and gums healthy, brush and floss daily.  At least brush twice a day.  Soft bristle tooth brush  Replace the tooth brush every 2 to 3 months or after an illness.  fluoride – a substance that helps prevent tooth decay  Buy a toothpaste with fluoride.  If you can’t brush, at least rinse your mouth out

2. 5.1 Notes  You should floss to get the food stuck between the teeth and to prevent cavities  Brush for 2 minutes each time: 30 seconds for each of the 4 areas. 30 seconds for each of the 4 areas.  Circular strokes are the best for brushing  Brush your tongue  Things that help fight tooth decay: Fruits & vegetables Fruits & vegetables Milk and yogurt – they contain calcium Milk and yogurt – they contain calcium No sugar (less sugar) No sugar (less sugar) Visit the dentist every 6 months Visit the dentist every 6 months

3. 5.1 Notes  tooth decay – a tooth or teeth start to disintegrate due to bacteria  plaque – a thin, sticky film that builds up on teeth and contributes to tooth decay  If you do not brush off the plaque, acid forms, and starts eating a hole (cavity) in your tooth.  cavity – a hole in teeth that forms due to acid when plaque builds up  dentin – bonelike material that surrounds the sensitive inner parts of the tooth  enamel – the hard material on the outer surface of the tooth

4. 5.1 Notes  tartar – hardened plaque that threatens gum health  3 layers of the skin: 1. epidermis – outer part of the skin 2. dermis – inner part of the skin 3. layer of fat cells

5. 5.1 Notes  5 functions of the skin: 1. waterproofing – keeps the water out of the body 2. Vitamin D formation – help build bones and teeth 3. protections – protects from germs and injuries 4. temperature control 5. sensation – any touching feeling  acne – a skin condition (face, neck back, chest, shoulders) that occurs when active oil glands cause hair follicles to become clogged.

6. 5.1 Notes  dandruff – a flaking of the outer layer of dead skin cells on the scalp (scalp is dry)  head lice – parasitic insects that live on the hair shaft and cause itching