Frog Anatomy

Nictitating membrane

Protects and keeps the eye moist

External nares

External nostril openings for air to enter

Tympanic membrane (aka tympanum)

Allows for hearing above and below the water, larger in males than in females

Tongue

Catches insects and is attached in the front of the mouth

Maxillary teeth

Row of teeth along the outside border of the upper jaw used to hold and grip food tightly

Vomerine teeth

Located between the two internal nares and are used to prevent the escape of prey from the mouth

skin

organ that allows oxygen and CO2 to flow freely in and out of the frog's body

Esophagus

The tube connecting the mouth to the stomach

Glottis

Opening to the lungs, prevents food or water from entering the lungs

bile

a chemical/fluid that aids in digestion of fats; it is secreted into the stomach by the liver and can be stored in the gallbladder.

Spleen

A storage area for blood

Stomach

The main location where chemical and mechanical breakdown of food occurs; after the esophagus

Small Intestine

Chemical digestion of food and nutrients are absorbed into the blood stream here

pancreas

produces insulin and other hormones, which mainly regulate the amount of glucose in the blood

cloaca

Urine, feces, sperm, and eggs exit the body through this opening

lungs

Gas exchange in blood cells occurs here (carbon dioxide is exchanged for oxygen)

Gallbladder

Stores bile

liver

Produces bile needed for the digestion of fats; large brownish- red, 3 lobed organ across the chest

Large Intestine

absorbs/removes water and packages fecal material

Fat bodies

Reserve energy storage to use during hibernation and breeding

teste

Produce sperm cells

kidney

Filter blood of impurities/fluid waste from the blood

bladder

Stores urine until it is released from the body

oviducts

Produces egg cells

eggs

Will produce tadpoles if fertilized when they exit the body

vertebrate

means has a backbone

amphibians

means "double life

the number of chambers in a frog heart

3 (2 atrium, 1 ventricle)

heart

Identify the structure labeled #20.

liver

Identify the structure labeled #21.

lung

Identify the structure labeled #22.

nictitating membrane

Identify the structure labeled #23.

tympanic membrane

Identify the structure labeled #24.

external nares

Identify the structure labeled #25.

chloaca

Identify the structure labeled #26.

intestine

Identify the structure labeled #27.

stomach

Identify the structure labeled #28.

fat bodies

Identify the structure labeled #29.

maxillary teeth

Identify the structure labeled A.

vomerine teeth

Identify the structure labeled B.

esphagus

Identify the structure labeled C.

Eustachian tubes

Identify the structure labeled D.

tongue

Identify the structure labeled E.

glottis

Identify the structure labeled F.

fat bodies

Identify the structure labeled A.

kidney

Identify the structure labeled B.

teste

Identify the structure labeled C.

male

Is this frog male or female?

oviducts

Identify the structure labeled with the red box.

bladder

Identify the structure labeled with the green box.

eggs

Identify the structure labeled with the blue box.

female

Is this frog male or female?