### body part | tissue | bone:

Tooth
* All teeth are bones
  - open rooted and grow continuously
  - develop from cellular buds inside the jaws
  - have the same general structure and consist of three layers
  - typically have three layers
* Every tooth has a protective layer surrounding the root, which is called the periodontal ligament
  - separate acupuncture meridian running though major organs in the body
  - is related to a specific organ or body system
  - needs special care to keep it clean and healthy
* Many teeth fixed with root canal therapy can last a lifetime.
* Most teeth are located in carnivores
  - break down food
  - come out of mouths
* Most teeth consist of incisors
  - lower incisors
  - third incisors
  - contain nerves
  - crush food
  - divide into incisors
* Most teeth have ability
  - cavities
  - crescents
  - deep grooves
  - edges
  - enamel
  - flat surfaces
  - hard enamel
  - pulp cavities
  - ridges
  - roots
  - same shapes
  - sides
* Most teeth have smooth cut edges
  - strong roots
  - structures
  - texture
  - tubular cavities
  - unique shapes
* Most teeth help apes
  - coyotes
  - diets
  - inflict serious wounds
* Most teeth look like enamel
  - fangs
* Most teeth perform different functions
* Most teeth serve functions
  - same functions
  - surround tongues
* Most teeth use for chew food
  - whitening products and treatments rely on the bleaching agent hydrogen peroxide
* Some teeth adapt for eat fruit
  - flesh
  - slice flesh
  - tear flesh
* Some teeth are behind teeth
  - for biting
* Some teeth are located in cats
  - reptiles
  - sharks
  - more yellow, and some teeth yellow with aging
* Some teeth are replaced by permanent teeth
  - break down meat
  - can be very small, at unusual angles, or even missing
* Some teeth cause heart problems
  - injuries
  - serious injuries
  - come in contact
* Some teeth consist of layers
  - contain poison
  - crush sea urchin shells
  - evolve over time
* Some teeth form continuous surfaces
  - cut surfaces
  - grind surfaces
  - large surfaces
  - small tusks
* Some teeth grow throughout lifetimes
* Some teeth have better mechanical properties
  - blades
  - cones
  - more than one channel and some have channels going sideways
  - patterns
  - slice blades
* Some teeth help animals
  - cougars
  - look like marrow
  - occur in amphibians
  - provide protection
* Some teeth replace milk teeth
* Teeth Dry food is recommended over soft food, it helps keep the teeth clean
  - actually begin to form in the second trimester of pregnancy
  - affected by fluorosis seem to continue to be resistant to dental caries
* Teeth also give shape to the face and aid in the process of speaking clearly
  - migrate into spaces when opposing teeth are missing
* Teeth also play a key role in the digestive system
  - an important role in the elk's eating habits
  - show increased wear on their biting surfaces
* Teeth appear lighter because fewer X-rays penetrate to reach the film
  - to play no role in feeding
* Teeth are a dime a dozen in the human fossil record, but precious few skeletons have been found
  - form of bone, and strong bones require adequate dietary calcium
  - natural color
  - absent throughout life
  - adapted for grasping and tearing rather than chewing
  - alive
  - all different shapes, sizes and shades
* Teeth are also calcified tissues
  - epidermal out- individual
  - essential for chewing food, and they play a major role in speech production
  - important facets of personal appearance
  - an example of a mesoscopically organized material
* Teeth are an important aspect of our self-image
  - feature of our attractiveness and presentation to others
  - another important way of increasing the surface area for bearing spores
  - composed of strong material and strong atomic bonds
  - crowded, overlapped or have insufficient room to grow in
  - especially important because they can tell scientists a lot about what an animal ate
  - exactly the same way
  - expensive to grow so no animal wants more than it needs
  - extremely sensitive
* Teeth are for biting
  - eating food
  - seizing prey, which is chunked by shaking
  - grouped as incisors, canines, premolars and molars
  - harder than bone and therefore fossilize more readily than bones
  - highly independent in their development
* Teeth are important for aesthetic reasons and for supporting facial structures
  - speaking, eating and smiling
  - studying mammal evolution because they are the most common mammal fossil
  - in harvesting and chewing feed
  - to students of mammals in a number of contexts
  - when introducing table foods
  - induction hardened for a uniform, consistent surface hardness
  - intact without evidence of oral injury
  - intermediate between typical human and typical ape forms
  - irregular, protruding, or broken, set in receding gums
* Teeth are large, sharp and evenly spread throughout the mouth with slight gaps between
  - well developed, set tightly to one another
  - like water
  - living tissue and unfortunately, like the rest of our bodies, nothing ever stays the same
  - on the pharyngeal bone of the jaw
  - modified placoid scales
  - modified, enlarged placoid scales
* Teeth are more jagged than most bears, suiting a carnivore
  - susceptible to cavities while sleeping due to reduced salivary flow
  - named by their set, arch, class, type, and side
  - nature's sign that it's time to move on to other foods, from a nutritional standpoint
  - necessary for appearance, for proper speech, and to properly chew food
  - occassionally part of the squamous components of an ovarian teratoma
  - of different types
* Teeth are often small and can tumble downstream in a current much like any stone or pebble
  - species or genus specific, so sharks are often identified by tooth structure
  - well-preserved on archaeological sites
* Teeth are one of the features that distinguish tuatara from lizards, which they otherwise resemble
  - most informative parts of a skeleton
  - pointed in captive walruses that are fed fish
  - present in the bird embryo
  - reduced in number
  - rooted in separate sockets in the gums
  - sensitive if they often hurt when they are exposed to cold or to air
  - set in sockets, but are known only in a few, small individuals
  - similar to mako sharks but smaller with bilateral cusps
  - strong and canine-like
  - stronger then the stresses that develop as a result of biting
  - the hardest part of any mammal and therefore they are the part most often fossilised
* Teeth are the hardest, densest part of the body, and among the most likely to be fossilized
  - most durable part of the mammal skeleton
* Teeth are the most common fossils found
  - durable part of the human body from which positive identifications are possible
  - windows to the soul
  - their main weapons, and a bite can cause serious injury
  - used for catching of the prey
* Teeth become brittle after root canals are completed
  - as they dehydrate
  - brownish-pink due to their porphyrin content
  - darker with age andexposure to substances such as coffee, tea,and tobacco
  - begin coming in a few days after the eyes open
* Teeth begin to come in, or erupt, around age six months
  - emerge shortly before two weeks of age and continue until the fifth week
* Teeth break down food
  - the food into smaller particles
* Teeth can be sensitive to heat, cold, sweetness and pressure
  - become unsightly and can make one appear older than they really are
  - develop fractures for a number of reasons
  - even lead to the identification of shark species like the requiem shark
  - eventually become loose and fall out
  - fall out earlier or later
  - grab, hold, tear, crush, and macerate food
  - identify disease
  - loosen in their sockets, opening up the possibility of infection
  - often become cracked or chipped from the barbell moving in the mouth
  - shine as many as ten shades brighter
  - show the relative age of an individual as they develop
  - solve a crime
  - titillate
  - vary in their permanence, their attachment, and their structural differentiation
  - care The emphasis in teeth care is in the prevention of caries
  - chattering sign of aggression
  - clenching default mechanism of the brain
  - consist mostly of calcium phosphate
* Teeth develop abnormally and many teeth are missing
  - from two embryonic tissues
  - display variable shapes for different functions
  - do more in our mouths than just chew food
  - enamel, dentine, cementum and pulp
* Teeth erupt as simple conical structures and over time wear into caniniform and molariform teeth
  - at different times in all individuals
  - full size and are ideal for study throughout life
  - fall off inside the night
* Teeth fossilize even better than bone, because the enamel is harder than bone
  - through a process called permineralization
  - frequently move following an injury to the jaw
  - function like bones
  - grind food
  - grinding and chattering are common when woodchucks are cornered
* Teeth grow right in place of the other ones when they are lost
  - throughout lifetime and have a cupped grinding surface
* Teeth have a distinct crown and pedicel
  - root system which serves to anchor the tooth in the jawbone
  - chips at tip
* Teeth have different shapes because they have different functions
  - for different jobs
  - extend cavities
  - the same composition as bone
  - to be very hard to withstand all the chewing and crunching of food
  - two basic parts, a root to anchor the tooth to the jaw and a crown above the gum line
* Teeth have unique characteristics
* Teeth help aid the digestive system in breaking down food
  - biologists identify an animal's approximate age
* Teeth includes bone cells
  - cell membranes
  - mast cells
  - plasma membranes
  - tooth roots
* Teeth inflict serious wounds
  - line the upper and lower jaws and are used for tearing and shredding food
  - make up most mammal fossil remains
  - naturally demineralize and remineralize
  - normally emerge at certain ages
  - occur in some species in the form of cuticle extensions
* Teeth provide a hard surface on which biofilms can attach themselves
  - an excellent way of tracing animals' development
  - record a history of what an animal eats and drinks
  - rot and diabetes are aggravated by sugar consumption
  - tell the story of their omnivorous food habits
* Teeth tend to appear in pairs, generally one after the other and the lower pairs first
  - change shades, usually yellow, with age
  - to grasp prey
  - too are bones
* Teeth usually appear in a certain order
  - stop growing after puberty
* Teeth vary in shape depending on what the animal eats
  - with diets
* Teeth wear because of the grinding action of chewing
  - differently depending on diet, for example
  - whitening is one of today's fastest-growing cosmetic procedures
* are located in dentists
  - means
* are part of combs
  - gear
  - saws
  - projections
  - solid objects
* are used for cavities
  - crushings
  - filling
  - grippings
  - killing
  - piercings
  - sawings
  - splittings
  - strainings
  - tearings
  - trophies
* brushing removes plaque and thereby constitutes a preventive measure against gingivitis
  - a preventive measure against periodontitis
+ Honey Badger, Physical description: Mustelids :: Mammals of Africa :: Mammals of Pakistan :: Fauna of Asia
  * A honey badger's teeth can be very different. Some teeth can be very small, at unusual angles, or even missing. Honey badgers of the subspecies 'signata' have a second lowar molar on the left side of their jaw, but not the right. Although it mostly chews soft food, the honey badger's cheek teeth are often very worn. The canine teeth are very short for carnivores. The tongue has sharp, backward-pointing papillae which help it in processing tough foods.
+ Kenyanthropus platyops: Australopithecines
  * The fossil 3.5 to 3.2 million year old. It has a broad flat face with a toe bone that suggests it probably walked upright. Teeth are intermediate between typical human and typical ape forms.
+ Shonisaurus, Fossils, British Columbia specimen: Ichthyosaurs :: Reptiles of North America