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Biology Chapter 30
Chordates & Fishes
| Question | Answer |
|---|---|
| Phylum Chordata | chordates; an animal that has , for least stage of its life a dorsal, hollow nerve cord; a notochord; pharyngeal pouches; and a tail that extends beyond the anus |
| Notochord | a large supporting rod that runs through the body just below the nerve cord |
| Pharyngeal Pouches | are paired structures in the throat region; develop gills |
| Vertebrae | individual segments that enclose and protect the spinal cordd |
| Cartilage | a strong tissue that supports the body and is softer & more flexible than bone |
| Atrium | a large muscular chamber that serves as a one-way compartment for blood that is about to enter the ventricle |
| Cerebrum | responsible for all the voluntary activities of the body |
| Cerebellum | coordinates body movements |
| Medulla Oblongata | controls functioning of many internal organs |
| Lateral Line System | Fishes can detect gentle currents and vibrations in the water with sensitive receptors |
| Swim Bladder | internal, gas filled organ that adjusts their buoyancy |
| Oviparous | fishes whose eggs hatch outside the mothers body |
| Ovoviviparous | species such as guppies the eggs stay inside the mother's body after internal fertilization |
| Viviparous | the embryos stay in the mother's body after internal fertilization |
| Cloaca | at the end of the large intestine is a muscular cavity |
| Nictitating Membrane | surface of the eye is protected from damage under water and kept moist on land by a transparent membrane |
| Tympanic Membranes | amphibians hear through a structure or ear drums |
| Pyloric Ceca | digestive enzymes |
| Olfactory bulbs | sense of smell or olfraction |
| Optic Lobes | process information from the eyes |
| Jawless Fishes | Lamypeys or hagfishes; filter feeders as larvae parasitic as adults |
| Cartilaginous Fishes: Class- Chrondrichthyes | sharks, rays, skates; flexible tissue, tooth like scales, large curved tail, thousands of teeth and torpedo shaped body |
| Bony Fishes: Class Osteichthyes | ray finned fishes and hard lobe finned fishes; hard tissue and some bones are jointed |
| Diffusion through Gills & Kidneys | both used to get rid of waste |
| Anadromous | fish that can live in saltwater and breed in freshwater |
| Catadromous | fish that can live in freshwater and breed in saltwater |
Created by:
swingren
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