. List the three separate places that frogs can exchange oxygen for carbon dioxide:
a. Cutaneous respiration occurs on the surface of the __
b. Bucco pharyngeal respiration occurs in the lining of the __
c. Pulmonary respiration occurs in the alveoli of the __

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.