frog dissection

amphibian

amphibian

all have moist smooth skin

all have 3 chambered heart

all must return to water to reproduce

tympanic membrane

frog’s external ear drum used to detect vibrations

nicititating mem

part of the lower eyelid that can come up and protect the eye from drying out on land or from danger underwater

Eustachian tube

connects the ear to the back of the throat to help relieve pressure when diving

glottis

slit like opening in the back of the throat that leads to the trachea

gullets

opening in the back of the throat that leads to the esophagus

known as pharynx in humans

trachea

tube, lined with cartilage, that carries air to the frog lungs

maxillary teeth

small teeth around the edge of the upper jaw bone

vomerine teeth

two teeth in the center of the upper jaw

nares

small openings to take air into mouth

epidermis

skin- frogs must be moist to breathe through

forelimbs

front legs

hindlimbs

back webbed legs

tendons

tissue that connects muscle to bone for movement

atrium

2 upper heart chambers

ventricle

one lower heart chamber

closed circulatory system

the frog has heart and blood vessels that carry blood all over the body

kidney

organs that help remove wastes

ureter

tube that carries urine from the kidney to the urinary bladder

cloaca

common location for wastes and reproductive materials

oviduct

tubes that carry eggs from ovary to cloaca

tadpole

frog baby

metamorphosis

to change body form

young frogs are called tadpoles & have gills instead of lungs

camouflage

to blend into the environment

spleen

small, oval organ used to produce blood cells

gall bladder

small round organ below the lobes of the liver

storage site of the bile that is used to digest fats

pancreas

organs that produces digestive matieral and insulin for maintaining sugar level

what are shorter- forelimbs or hindlimbs?

forelimbs are shorter

how many number of toes on forelimbs & hindlimbs

forelimbs = 4

hindlimbs = 5

are hindlimbs or forelimbs webbed?

hindlimbs are webbed

general function of the forelimbs

grip

jumping

general function of the hindlimbs

swimming

climbing

what do digits in hindlimb help them do

aid them in swimming

how does nicitating membrane help frogs on land and water?

land- keep moisture

water- protect the eye

how does the tympanic membrane aid in frogs survival in water and land?

detects sound waves through t, allowing them to better communicate and sense their enviornment

where does air travel from the mouth to?

air goes from mouth to glottis to enter lungs

what type of symmetry do amphibians have?

bilateral

if a frog is a male, the tympanic membrane will be bigger or smaller than the eye?

bigger

if a frog is a female, the tympanic membrane will be bigger or smaller than the eye?

smaller

what gender will the thumb pad on forelimb appear swollen

male

where is the position of the frog’s eyes and how does it aid in its survival?

tit is in the top of the head & this makes it so the eyes can see above water while the rest of the body is protected under.

why does the frogs eyes appear sunken in appearance?

sinks into the mouth to help swallow

is the frog’s tongue in front or back of mouth?

attached to the front of the mouth

what type of teeth are used for chewing food?

maxillary

what type of teeth are used for gasping food & how does it location aid that

vomerine & it is at the top of roof to show its for grasping food

where does gullet lead to

stomach

where does glottis lead to

lungs

eggs created in female frogs

eggs are created in ovaries and will pass through the oviducts to cloaca

closed or open circulatory system?

closed that is important for gas exchange

why is the ventricle heart thicker than atrium?

the ventricle of the heart has to pump blood all around the body, so it pumps at a further distance

what does the ridges in stomach help w ?

squish food and stretch to hold more food