omg....please help me figure out and compare the respritory systems of a frog, earthworm, and squid...thankyou (:

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anonymous · Answer

frog: http://www.tutorvista.com/content/biology/biology-iii/animal-morphology/respiratory-excretory-nervous-reproductive-system-frog.php earthworm: 4. Respiratory System Earthworms do not have lungs. They breathe through their skin. Oxygen and carbon dioxide pass through the earthworm’s skin by diffusion. For diffusion to occur, the earthworm’s skin must be kept moist. Body fluid and mucous is released to keep its skin moist. Earthworms therefore, need to be in damp or moist soil. This is one reason why they usually surface at night when it is possibly cooler and the “evaporating potential of the air is low.” (www.amonline.net.au/factsheets/earthworms.htm) squid: Squid have 2 gills inside their mantle which take oxygen from the water. The blood is distributed by 3 hearts.