The Chordates 30-1
Fishes 30-2
Amphibians 30-3
Terms : Hide Images
| 192701574 | chordate | any animal of the phylum Chordata having a notochord or spinal column | 0 | |
| 192701575 | notochord | long supporting rod that runs through a chordate's body just below the nerve cord | 1 | |
| 192701576 | pharyngeal gill slits | all chordates share this, appear in the pharynx at some stage in their development, evolved to aid in respiration and filter feeding | 2 | |
| 192701577 | vertebra | individual segment of the backbone; encloses and protects the spinal cord | 3 | |
| 192701578 | cartilage | strong connective tissue that supports the body and is softer and more flexible than bone | 4 | |
| 192701579 | atrium | large muscular upper chamber of the heart that receives and holds blood that is about to enter the ventricle | 5 | |
| 192701580 | ventricle | the more muscular chamber(s) of the heart that pumps blood | 6 | |
| 192701581 | cerebrum | largest part of the brain; responsible for voluntary muscular activity, vision, speech, taste, hearing, thought, and memory | 7 | |
| 192701582 | cerebellum | the "little brain" attached to the rear of the brainstem; it helps coordinate voluntary movement and balance | 8 | |
| 192701583 | medulla oblongata | area of the brain that controls the functioning of many internal organs | 9 | |
| 192701584 | lateral line system | sensitive receptor system that enables fish to detect gentle currents and vibrations in the water | 10 | |
| 192701585 | swim bladder | internal gas-filled organ in many bony fishes that adjusts their buoyancy | 11 | |
| 192701586 | oviparous | term used to refer to fishes whose eggs hatch outside the mother's body | 12 | |
| 192701587 | ovoviparous | fertilized egg develops in mother but does not receive nutrients from her. The mother and embryo are separated | 13 | |
| 192701588 | viviparous | producing living young instead of eggs, in the manner of most mammals and some reptiles and fishes | 14 | |
| 192701589 | cloaca | a muscular cavity at the end of the large intestine through which digestive wastes, urine, and eggs or sperm leave the body | 15 | |
| 192701590 | nicitating membrane | transparent substance on an amphibian that protects the eye under water and moist on land | 16 | |
| 192701591 | tympanic membrane | eardrum of amphibians inside the skull; vibrates in response to sound, allowing hearing | 17 |
