Goal for Today • Objectives: Students will be able to- • Observe and identify and explain the role of the major parts of the digestive system and urinary system in a frog. • Observe and identify traits help amphibians survive in both aquatic and land environments.
Safety • Avoid contact with your face. • Know where the nearest eye-wash station is. • Firmly secure specimen to your dissecting pan. DO NOT dissect specimen while holding it. • Handle the scalpel with extreme care and always cut away from others and yourself.
Amphibian Disection • Amphibian (amphi- on both sides, bios life)- Animals that live in both land and water. • Leopard frogs- Common in North America
Frog Backgroud • Frogs begin as tadpoles and have tails and gills • Adolescent frog develops lungs and legs.
Skin • Frogs can breathe through their skin, and absorb liquid through their skin.
Tympanic membrane • Sound causes tympanic membrane to vibrate. (similar to an ear drum). • Can hear clearly in and out of water.
Fill out your packets! • Whenever you need guidance look at your packets. They contain loads of information. • Mrs. Parker and I will walk around assisting groups. • If you know where something is located, help others locate it.
Eye sight • Eyes are on side and are far forward. • Helps detect predators while still being submerged in water.