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20 Cards in this Set
- Front
- Back
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tympanic membrane
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Vibrations from water or air are picked up by the tympanic membrane and transmitted to the inner ear and then to the brain. It also amplifies the sounds frogs make.
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vocal cords
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Sound-producing bands of tissue in the throat. Air moves over the vocal chords and they vibrate, causing molecules in the air to vibrate.
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Some more characteristics of amphibians
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• They have two pairs of legs, or a total of four limbs.
• They lay their eggs in water. • They obtain oxygen through their smooth, moist skin. Many also have respiratory organs called lungs. • Their sensory organs are adapted for sensing on land. Most amphibians live in moist environments. Their skin is a respiratory organ |
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Anura
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Order of Amphibians without tails which includes frogs and toads.
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Salamanders belong to the order
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Caudata
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Amphibians breathe through their
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lungs, gills, or skin
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Amphibians probably evolved from:
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Aquatic tetrapods
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Caecilians are:
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limbless amphibians
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3 characteristics of amphibians are:
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1.Amphibians are ectotherms 2. Amphibians undergo metamorphosis 3. Amphibians have a 3-chambered heart to ensure that cells receive the larger amount of oxygen required for walking on earth (as opposed to the 2 chambered heart of fishes who require less oxygen for swimming)
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Fishes are:
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vertebrates with backbones and nerve cords that have expanded into brains
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Bony fishes are made up of two groups; what are they?
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lobe finned (lungfishes), and ray-finned
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Name 4 types of fish scales and give an example of a fish which has them.
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1. Ganoid scales (diamond shaped) - Gars, 2. Placoid scales (tooth shaped) - cartilaginous fishes: sharks, rays, and chimaeras, 3. Ctenoid scales (have tiny teeth called ctenii on the posterior edge that give them a rough texture) most ray-finned fishes have these, 4. Cycloid scales Cycloid scales are thin and overlapping, permitting more flexibility. Unlike ganoid scales, cycloid scales grow as the fish grows, and in some species, show annual growth rings. Cycloid scales are found in the bowfin
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Name the classes of fish
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1.Agnatha (Myxini & Cephalaspidomorphi)2.Chondrichthyes, 3.Osteichthyes
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What are placoderms ?
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Various extinct fishes of the class Placodermi, characterized by bony plates of armor covering the head and flanks. The bodies of placoderms were spindle-shaped or flattened, and their skeletons were usually partially bony and included a cranium. Placoderms were the first group of fish to evolve jaws, but are not closely related to the jawed fish of today.
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What are nuptial pads?
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They are horny or thickened pads on each thumb of the male frog. They are especially prominent during the mating season, when they assist the male in grasping the female during the sexual embrace, in which the male extrudes sperm over the eggs as these are ejected by the female.
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Caudate
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A cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form. A LIZARD LIKE AMPHIBIAN.
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What did amphibians evolve from?
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aquatic tetrapods
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Ectotherm
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An animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals.Cold blooded animals - those who cannot regulate their body temperature.
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What order do frogs and toads belong to?
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Anura
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How many species of fish have been identified?
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27,000 - 28,000. There may be another 20,000 yet unknown!
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