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13 Cards in this Set
- Front
- Back
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What are some of the main characteristics of the class amphibia?
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-Tetrapods
-Double life -Skin with mucoid secretions, lack scales or hair. -larvae are usually aquatic and they go through metamorphosis to reach adulthood. -3 chambered heart, 2 atriums and one ventricle. -ectothermic. -first animal with a true tongue. |
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What animals belong to the order caudata?
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Salamanders and newts.
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What are some characteristics of the order caudata?
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-keep their tale throughout life.
-unspecialized legs and they lack middle ear. -they do internal fertilization without copulation. -Neotenic--became sexually mature while retaining larval characteristics. -fertilization must occur in water. |
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Describe internal fertilization without copulation...
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Males use chemical messages and they deposit a packet of sperm, female follows the male and sits down and pulls the sperm up.
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What animals belong to the order gymnophiona?
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Caecilians. Salamanders that have lost their legs.
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Describe some characteristics of the order gymnophiona...
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-Look segmented because their skin folds over muscles.
-Burrow. -Almost blind because of the skin over their eyes. -Internal fertilization--some have live births and other lay eggs. -Typically live in tropical places. |
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Which order is the largest?
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Anura
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What does the tympanic membrane do?
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Transmits vibrations into sound. Allows the frog to hear.
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What are some characteristics of the order anura?
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-Carnivorous.
-Frogs and toads. -Amplexus -Urostyle--caudal vertebrae fused. -External fertilization |
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What is amplexus?
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When the male rides on top of the female to try to ger her to release eggs outside the body so that he can put sperm on top of it.
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What is cutaneous reproduction?
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Respiration across the skin, this can occur in water or on land.
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What is the buccal pump?
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Forces air into lungs, positive pressure breathing. Gulps in air.
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Describe the circulatory system...
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-Dual circulatory system.
-use lungs for terrestrial breathing. -Diffusion. -The aortic receive blood (o2 rich and poor). -1 ventricle that pumps and mixes the blood. |
