Characteristics – 1. _______________ tubular nerve cord (spinal cord).
2. Paired pharyngeal __________________; temporary or permanent.
3. Notochord that becomes the ____________________________.
4. _________ present.
Systems of the body:
1. ___________________ - bones
2. ___________________ - tissues attached to bones for movement
3. ___________________ - skin & other coverings
4. ___________________ - breakdown of food
5. ___________________ - breathing; exchange of gases
6. ___________________ - movement of blood
7. ___________________ - elimination of wastes
8. ___________________ - awareness & response
9. ___________________ - production of offspring
10. __________________ - hormones for body regulation
Vertebrates exhibit ___________________ symmetry, cephalization, a ____________ circulatory system, ________ coelom, endoskeletons, and ________________ & ____________________ girdles.
PHYLUM: _________________
SUBPHYLUM: _______________
SUPERCLASS : ________________
CLASSES: 1. _________________________ 2. ________________________ 3. __________________
CLASS AGNATHA: jawless fishes - examples - _______________________________________
1. Freshwater or ___________. Eel-like.
2. No true jaws, scales, or ________. Mouth is _____________. Obtains food by attaching _____________containing teeth & drains _____________ out of the host.
3. ___________________ skeleton.
4. ______ - chambered heart.
5. Digestive system without a _______________.
6. ______________ fertilization.
CLASS CHONDRICHTYES – cartilaginous fishes – examples - ____________________________
1. True jaws & ______________.
2. Gills present (5-7 pairs) but not free & opening through _________________________. No operculum.
3. No swim ___________________.
4. __________________ skeleton. Streamlined body. Paired ___________ & __________ fins. Two ____________median fins. Pelvic fins modified in the male for __________________. ____________________________ used to detect movement.
5. Mouth ___________. Jaws present.
6. Skin with ________________ scales & mucus glands.
7. _______- chambered heart.
8. Sexes ________________. Oviparous, ovoviviparous, or viviparous. ____________ fertilization.
CLASS OSTEICHTHYES – bony fishes – examples ______________________________________
1. Freshwater & ____________.
2. Gills present supported by ___________________ with an __________________ covering them.
3. True jaws & fins. ________________ skeleton.
4. ___________ bladder present – used to regulate depth.
5. _____________ can be used to determine the age.
6. ____________________________ camouflaged.
7. ______ - chambered heart.
8. ____________ sexes. ______________________ fertilization.