Module 2: Animals And Structures Flashcards
Process
Bony prominence
Eminence
Bony projection, not as prominent as process
Spine
Long, thin process
Tuberosity
Large, roughened eminence, often tendon/ligament attachment site
Tubercle
Small, roughened eminence
Boss
Smooth, round, broad eminence
Articulation
Area where adjacent bones are in contact; joint
Condyle
Rounded articular process
Epicondyle
Non-articulate projection adjacent to a condyle
Head
Large, round, usually articular end of a bone
Shaft
Long, straight section of bone
Neck
Section of bone between the head and shaft
Torus
Bony thickening
Ridge
Linear bone elevation
Crest
Sharp, thin bone ridge often found between adjacent muscle masses
Line
Raised linear surface not as thick as a torus or as sharp as a crest
Facet
Small articular surface
Fossa
A typically broad and shallow depressed area
Fovea
Pitlike depression, smaller than a fossa
Groove
Long pit or furrow
Sulcus
Long, wide groove
Fontanelle
Space between cranial bones of an infant or immature individual
Suture
Where adjacent bones of the skull meet or articulate
Foramen
An opening through a bone, usually a blood vessel/nerve passes through
Canal
Tunnel-like, extended foramen
Meatus
A short canal
Sinus
Cavity within a cranial bone
Alveolus
Tooth socket
Which bone is the most diagnostic of a species?
Skull
Bones can be what?
Paired or unpaired
Midline/axial bones tend to be what?
Unpaired
Skull bones can be what?
Paired or unpaired
Cranium bones
Major bones of mammal skulls, variation found in birds, reptiles, fish, etc.
Paired bones of the Cranium
Frontal (Unpaired in some species), Nasals, Maxillae, Pre-maxillae/incisives, lacrimals, parietal, temporals, zygomatics/jugals, palatines, pterygoid, mandible (often paired, can fuse), inferior nasal conchae
Unpaired bones of the cranium
Occipital complex-supraoccipital/exoccipital/basioccipital, sphenoid complex-prespenoid/basisphenoid, Vomer, Ethmoid
Vertebra
Cervical (usually 7)
Thoracic (usually 12-the ribs articulate)
Lumbar (usually 4-6)
Sacral (4-6 fused to form sacrum)
Coccygeal (varies)
Clavicle
Present in some mammals, maybe vestigial/absent.
Os coxae
Hip bones-sacrum and os coxae usually fuse
Scapula
Shoulder blade
Humerus
Upper arm
Radius
Forearm
Ulna
Forearm
What can the radius and ulna do in many species?
Fuse
Carpals
Wrist
8 carpals
Radial (1)
Ulnar (1)
Intermediate (1-can fuse to radial)
Distal (2-4)
Accessory (1)
Metacarpals
Hand/forepaw, often 5, sometimes 1
Phalanges
Fingers
Types of phalanges
Proximal, intermediate, distal
Total: 14
How many phalanges does the first digit have?
2-proximal and distal
Femur
Upper leg
Tibia
Lower leg
Fibula
Lower leg-can be fused to tibia
Tarsals
Ankle
7 tarsals
Talus/astragalus (1)
Calcaneus (1)
Central (1)
Distal (2-4, can fuse)
Metatarsals
Foot/hind paw, often 5, sometimes 1
Phalanges
Toes, typically 14
Diphyodont
Two sets of teeth-deciduous and adult
Polyphyodonts
Multiple sets of teeth in a lifetime
Teeth categories
Incisors, canines, premolars, molars
Heterodonts
Animals with 2+ types of teeth
Homodonts
Animals with one type of tooth
Incisors
Small, chisel-shaped teeth with a single cusp and root; nipping, scraping and tearing
Artiodactyls
Even-toed ungulates (pigs, cattle, deer)
Canines
Conical and single cusped with a single root; puncture, hold, tear
Premolars and molars
Premolars-single/double rooted, narrow or elongated
Molars-2+ roots, rear of mouth, larger, square and wide
Chewing and grinding
Dental formula
I:C:P:M
i:c:p:m or d in front to signify deciduous
Total: teeth in formula x2
Ex: 1/1:0/0:2/1:3/3
Horse’s first premolar
Wolf teeth
Dog 4th upper premolar and lower 1st molar
Sectorial/carnassial teeth
Form shearing complex
Supernumerary
Additional teeth
Do adults or young have more teeth in mammals?
Adults-less deciduous teeth
Dogs have no 1st premolar or any molars
Position of teeth indicated by:
Numbers
Incisors 1-3
Canines 1
Premolars 1-4
Molars 1-4
What do you place in front of tooth “number”
R or L for right or left
Superscript
Maxilla
Subscript
Mandible
Dental #s simplified
Start in upper right quadrant and end in lower right
101-110 right upper
201-210 left upper
301-311 left lower
401-411 right lower
Cusps
Occlusal projections on upper and lower molars
Cusps on upper teeth
-cone
Cusps on lower teeth
-conid
Cusplets on upper teeth
-style/-conule
Cusplets on lower teeth
-stylid/-conulid
Protocone
Mesiolingual cusp on upper molar, largest cusp
Hypocone
Distolingual cusp on upper molar
Paracone
Mesiobuccal cusp on upper molar
Metacone
Distobuccal cusp on upper molar
Protoconid
Mesiobuccal cusp on lower molar, largest cusp
Hypoconid
Distobuccal cusp on lower molar
Metaconid
Mesiolingual cusp on lower molar
Entoconid
Distolingual cusp on lower molar
Hypoconulid
Distalmost cusp on lower molar, highly variable
Paraconid
Mesialmost cusp on lower molar, highly variable even in a single individual