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amphibians not have a lateral line?

objectives

• Relate the structure of amphibian skin to the types of habitats in which amphibians can survive.

• Identify three adaptations for life on land shown by the skeleton of a frog.

• Sequence the flow of blood through an amphibian's heart.

• Describe how a frog fills its lungs with air.

• Describe the digestive and excretory systems of amphibians.

• Discuss an amphibian's nervous system.

vocabulary mucous gland pulmonary circulation systemic circulation pulmonary respiration cutaneous respiration duodenum ileum mesentery vent nictitating membrane tympanic membrane columella

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