Lab 1 Flashcards
Hair that exhibits continuous growth
Angora
Hair that reaches a definitive length and is shed
Definitive
Long, stiff hairs, that serve as tactile receptors
Vibrissae
Hair that functions primarily for protection
Guard Hair
Hair that usually consists of short, dense undercoat
Under Hair
Glands that produce milk to nourish young
Mammary Glands
Provides pressure gradient for respiration
Muscular Diaphragm
How many chambers does a mammal heart have?
4
How many aortic arches do mammals have? what direction?
1, to the left
Opening in bone for a blood vessel or nerve
Foramen
Projection of bone
Process
Knob-shaped bump on bone
Condyle
Depression in bone for muscle attachment
Fossa
Elevated region of bone
Crest or ridge
area between zygomatic arch and cranium where eye rests
Orbit
rounded, hollow, thin-walled structure
Bullae
Opening through bone
Fenestra
Junction between two contiguous bones of the skull
Suture
5 differentiated sections of the vertebral column
Cervical, Thoracic, Lumbar, Sacral, and Caudal
Lower jaw is composed of how many pairs of Dentaries?
1 pair
How does the lower jaw interact with the cranium?
Dentary-squamosal jaw articulation
Points and bumps on crown of tooth
Cusps
Portion of tooth above gumline
Crown
side of the teeth closest to the tongue
lingual surface
side of the teeth closest to the cheek
Labial/buccal surface
surface of the tooth that meets with the tooth in the opposing jaw
Occlusal surface
Gap between teeth
Diastema
Having 2 sets of teeth, baby and adult teeth
Diphyodont dentition
Having one set of teeth
Monophyodont dentition
Having teeth that vary in size, structure, and function
Heterodont dentition
Chisel-like teeth that are used for gathering and gnawing
Incisor
Long, unicuspid teeth that are used for gathering and holding
Canine
Flattened teeth used for grinding and slicing, behind canines
Premolar
Flattened teeth used for grinding and slicing, behind premolar
Molar
teeth that are the same in size, structure, and function
Homodont dentition
High crowned molars; allows teeth to wear down but still be useful
Hypsodont dentition
low crowned molars
Brachyodont dentition
primitive molar, all other molars evolved from this type
Tribosphenic
Modified tribosphenic molar with crests connecting cusps
Lambdodont
Upper molar has a “V” shaped crest
Zalambdodont
Upper molar has a “W” shaped crest
Dilambdodont
Modified tribosphenic molar containing an extra cusp giving the molar a square shape
Euthermorphic
Cusps fused together to form long ridges; provides abrasive surface for grinding vegetation.
Lophodont
Cusps are elongated and form ridges that are crescent shaped and longitudinally oriented.
Selenodont
Quadrate molars with round cusps
Bunodont
cusps are reduced to 2 major cusps that form a sharp cutting edge
Secodont
A specialized secodont molar found only in the Order Carnivora
Carnassial Pair
Shorthand method used my mammalogists to indicate number of teeth.
Dental formula
Name the 3 middle ear bones
Malleus, incus, and stapes
Derived from the articular bone in lower jaw
Malleus
derived from quadrate bone found in cranium
Incus
Derived from columella
Stapes
Walking
Ambulatory
Running
Cursorial
Jumping
Saltasorial
Climbing utilizing long, sharp claws
Scansorial
Hand over hand swinging
Brachiating
quadrapedal inverted “walk” while hanging under tree limbs
sloth movement
Entire foot rests flat on the ground
Plantigrade
Only phalanges rest on the ground
Digitigrade
Only the distal most ends of the phalanges (Tip toe) rest on the ground
Unguligrade
Columnar limbs in which each bone is positioned directly above the bone below.
Graviportal