Frog Frog Dissection LabDissection Lab

External Nares

Skin Tympanum

Vomerine Teeth

Maxillary Teeth

Eustachian Tubes

Internal Nares

Glottis

Esophagus

Tongue

Heart

Lungs

Liver

Stomach

Small Intestine

Gall Bladder

Large Intestine

Spleen

Kidney

Oviducts/Eggs

Testis

Skin It’s covered with a protective slime secreted

by glands within the skin. Oxygen passes through tiny blood vessels in the frog’s skin, helping it breathe. These colored patches on the skin are called chromatophores, which act as camouflage, helping the frog blend

into its surroundings in the wild.

Home

Tympanum

The tympanum, found just behind the eyes, functions as the ears of

the frog. They receive sound waves both above and below

water allowing the frog to hear.

Home

External Nares

The nares primary role is to let air into and out of the frog. This

is a view of the nares from outside of the frog.

Home

Internal Nares The nares primary role is to let air into and out of

the frog. This is a view of the nares from inside of

the frog.

Home

Maxillary Teeth

This set of teeth is used for holding

prey.

Home Vomerine Teeth

This set of teeth is also

used for holding prey.

Home Eustachian Tubes

The eustachian

tubes function to equalize pressure on both sides of

the eardrum or tympanum

Home

Tongue

The tongue aids in

swallowing and catching prey. In humans the

tongue also aids in speech

and taste.

Home

Glottis

The glottis is the opening between the vocal chords at the

upper part of the windpipe or larynx.

Home

Esophagus

Food is swallowed through the

esophagus where peristalsis aids its movement to the

stomach.

Home

Lungs

The lungs transport oxygen to the blood as well as remove

waste like carbon dioxide through a

process called respiration.

Home

Heart

Unlike the human heart the heart of a frog only

has three chambers (two atria and one

ventricle) however the role and function is the same. The heart pumps blood throughout the body carrying oxygen

and nutrients and picking up waste to be

filtered by other parts of the body.

Home

Large Intestine

The main role of the large

intestine is to absorb water

and store fecal material until it

can be excreted from

the body.

Home

Small Intestine

The small intestine receives

the mixture of chyme from the stomach through the pyloric valve.

In the small intestine nutrients are absorbed from the tiny villi lining the inner walls of

the small intestine.

Home

Stomach

In the stomach food is further

broken down by gastric juices and peristalsis until it becomes a liquid substance called

chyme.

Home

LiverThe liver

produces bile, a substance that emulsifies fats

contained within the food

we eat, and stores it in the gall bladder to

be secreted into the small intestine.

Home

Gall BladderThe gall bladder stores bile that is

received from the liver. Bile is secreted from

the gall bladder into the first

section of the small intestine (duodenum) to

help aid in digestion.

Home

Spleen

The spleen helps to destroy old red

blood cells and lymphocytes,

which are cells that produce

antibodies to help fight infected and cancerous cells.

Home

Kidneys

The Kidneys filter out waste from the blood through structures

known as nephrons. The waste removed is combined with water to

form urine.

Home

Oviducts & Eggs

The oviducts are tubes that

carry eggs from the ovaries to

the uterus. The eggs are the

female reproductive

cell.

Home

Testis

The testis are the male

reproductive gland that produce

sperm and male

hormones such as

testosterone.

External Nares

Tympanum

Vomerine Teeth

Maxillary Teeth

Eustachian Tubes

Internal Nares

Glottis

Esophagus

Tongue

Heart

Lungs

Liver

Stomach

Small Intestine

Gall Bladder

Large Intestine

Spleen

Kidney

Oviducts/Eggs

Testis