bio lab practical 3

all

vomerine teeth

two teeth, roof of mouth, hold and crush prey

maxillary teeth

small and many of them, top jaw, grips prey so it can’t escape

webbing between toes where?

in the hind lims

webbing helps with what

propels frog forward, increases surface area

tympanum

the external eardrum in frog

why are eyes located on top of head

to view predators and prey from all directions

how many chambers in heart

3 chambers

oxygenated and deoxygenated blood

do mix in ventricle before leaving heart

how does air enter lungs

when floor of mouth is pushed up (buccal pumping)

male frogs

have testes and vocal sacs

testes male frog function

produce sperm

vocal sac male frog function

used to call mates, establish terriorties

female frogs

hae ovaries and oviducts

ovaries female frog function

produce eggs

oviduct female frog function

coats egg w/ jelly like material for protection

first line on left

internal nares

frog internal nares function

connected to lungs, allows frog to breathe w/ mouth closed

first line on right

maxillary teeth

frog maxillary teeth function

gripping prey so it doesn’t escape

second line on right

vomerine teeth

frog vomerine teeth function

2 teeth, hold and crush prey

forth line on right

glottis

frog glottis function

tube leading to lungs, breathing and vocalizing

third line on right

eye bulges

frog eye bulges function

helps frog swallow by pushing food down frog’s throat

bottom line on right

tongue

frog tongue function

sticky, catch and keep prey, doesn’t help frog swallow prey tho

what is 1

external nares

frog external nares function

assist with breathing

what is 2

eye

frog eye function

sight

what is 3

nicititating membrane

frog nicititating membrane function

transparent eyelid that protects eye in water, attached to bottom of eye

what is 4

tympanum

frog tympanum function

sends waves for sensory processing

what is 5

fore limbs

frog fore limbs function

shorter/weaker, support for jumping, 4 toes

what is 6

hind limbs

frog hind limb function

more muscular, 5 toes, webbing helps propel frog

what is 1

heart

frog heart function

3 chambers, pumps blood

what is 2

lungs

frog lungs function

gas exchange / respiration

what is 3

liver

frog liver function

3 lobes: secrete bile, monitor digested food level in blood, store excess products

what is 4

stomach

frog stomach function

break down food, strong acids secreted

what is 5

small intestine

frog small intestine function

finishes digestive process of food, nutrients are absorbed

what is 6

large intestine

frog large intestine function

absorbs water, stores waste

what is 1

olfactory bulb

frog olfactory bulb function

sense of smell, poor in frogs

what is 2

cerebral hemisphere

frog cerebral hemisphere function

regulates voluntary actions (memory, intelligence, consciousness)

what is 4

medulla

frog medulla function

regulates involuntary functions (respiration, digestion)