Skin & Derivatives + Teeth (Lab Week 1)

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hair growth where hair is shed & replaced once a given length is reached

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68 Terms

1

hair growth where hair is shed & replaced once a given length is reached

definitive

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2

continuous hair growth

angora

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3

total body covering of hair

pelage

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4

long, stiff hair that serve as tactile receptors, e.g. whiskers

vibrissae

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5

2 types of guard hair

awn & bristles

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6

outer layer of hair on most mammals, exhbits definitive growth -- expanded distally, weakened basally

awn (most common type of guard hair)

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7

firm hairs with angora growth, e.g. lion mane. May be stiff/enlarged such as spines/quills

bristles (less common type of guard hair)

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8

2 types of underfur

wool & fur

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9

long, soft often curly with angora growth underfur

wool

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10

relatively short underfur, with definitive growth

fur

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11

teeth with low rounded cusps for crushing molar power, found in omnivores

bunodont

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12

shearing teeth, type of secodont (P4m1), found in carnivores

carnassials

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13

serrated teeth for grinding vegetation 3rd premolar (PM3, pm3), found in marsupials

plagiaulacoid

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14
<p>Hypsodont or brachyodont?</p>

Hypsodont or brachyodont?

hypsodont

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15
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homodont

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16
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selenodont

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17
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bilophodont

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18
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lophodont

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19
<p>Hypsodont or brachyodont?</p>

Hypsodont or brachyodont?

hypsodont

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20
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selenodont

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21
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bilophodont

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22
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carnassial

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23
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euthemorphic

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24
<p>2 words to describe these teeth</p>

2 words to describe these teeth

bunodont & brachyodont

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25
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hypsodont

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26
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brachyodont

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27
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zalambdodont

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28
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dilambdodont

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29

type of scales in mammals

epidermal

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30

when young animals replace juvenile pelage with adult pelage

post-juvenile molt

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31

molts that allow animals to replace hairs that are worn

annual molts

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32

molts that allow variable fur characters in summer vs. winter

seasonal molts

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33

horn-like structures within the skin that secondarily fuse to the skull; found in both sexes, remained furred in females, not males, ex: giraffe & okapi

ossicones

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34

branched, solid bone, covered by velvet when growing, shed annually, found only in males (except female caribou)

antlers

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35

section between the bases of the 2 antlers

burr

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36

main branch of the antlers

mainstem

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37

branches at the top of the antler

crown

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38

tine on the antlers closest to the skull

brow tine

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39

tine behind the brow tine

bez tine

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40

living skin/fur on antlers

velvet

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41

similar to horns, but with a prong & shed annually

also projection of frontal bone

may be found on both sexes but larger on males

pronghorn

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42

bony core covered by keratin sheath (AKA bone)

unbranched, permanent with indeterminate growth

projection of frontal bone

found on both sexes, larger on males

horns

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43

central core of hair

medulla

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44

middle layer of hair that surrounds the medulla

cortex

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45

outer layer of hair

cuticle

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46

incisor procumbency where teeth point outward

proodont

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47

incisor procumbency where teeth point straight down

orthodont

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48

incisor procumbency where teeth point backward

opisthodont

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49

place entire foot on the ground (digits to ankle/wrist)

plantigrade

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50

walk only on digits, have elevated the carpals/tarsals off the ground

digitigrade

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51

bearing weight on terminal phalange and specifically on the hooves

unguligrade

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52

3 pricipal cusps arranged in a triangle in the upper tribosphenic molar

trigon

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53

cusp on the lingual side of the tooth in upper teeth

protocone

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54

cusp that is anterior and labial in upper teeth

paracone

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55

cusp that is posterior and labial in upper teeth

metacone

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56

crests that separate cusps from one another

cristae

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57

ledge located along the labial side of the tooth, which may support additional cusps

stylar shelf

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58

molar with 3 cusps

tribosphenic molar

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59

lower teeth version of trigon

trigonid

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60

labial cusp on the lower teeth

protoconid

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61

anterior & lingual cusp on the lower teeth

paraconid

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62

posterior & lingual cusp on the lower teeth

metaconid

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63

4th cusp on posterolingual side of the tooth (upper)

hypocone

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64

cusp that is added when teeth are quadritubercular

hypocone/hypoconid

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65

4th cusp on posterolingual side of the tooth (lower)

hypoconid

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66

crescent shaped ridge formed in selenodonts

selenes

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67

bladelike teeth designed for cutting/slicing ex: carnassials

secodont

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68

PM4m1

carnassial pair

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