Zoology Chondrichthyes Lecture Notes
Chondrichthyes digestive system characteristics?
More advanced that Agnathans. Stomach, liver, gall bladder, pancreas, spiral valve in intestines.
Spiral Valve found where? functions?
Found in lower portion of intestin
Zoology Notes on Cell Formation
connection between cells that holds them together as a unit
a process in which the cells of a multicellular individual become specialized during
process of taking in food
Egg Development in Zoology Notes
Lay eggs that hatch outside the mother's body
Organs sensitive to vibrations in surrounding water. Form a row along each side of the
Lateral Line System
Develops into the central nervous system
Sequence of animals seen over time
Fish, amphibian, reptile, bird and mammal
Earliest chordate known
Link between water and land
Reptiles with holes in skull to increase space for
Zoology Batoid Lecture Notes
Dorsoventrally flattened, enlarged pectoral fins for swimming and fanning the bottom
looking for prey. Spiracle (modified gill slit) on dorsal surface and gill slits on ventral
surface. Reduced tail. tail sp
Zoology Directions Lecture Notes
Type of symmetry on an animal that typically has a head. Splits the body in half sideways. Can
only divide 1 way.
Type of symmetry that can divide 2 or more ways.
Zoology Shark Characteristics Lecture Notes
Skates characteristics: spiracle and gill slits? tail? feed on? reproduction? ecology? 1 in
Spiracle=dorsal, gill slits=ventral. Elaborate tail (more than rays) can have dorsal fins near tip or
Zoology Urochordates Lecture Notes
How do most species of pterobranchia reproduce?
How do enterophneusta feed?
What are the four major characteristics of chordates:
dorsal hollow nerve chord, notochord, post anal tail,
Zoology: Fish Lecture Notes
poikilotherm, aquatic chordate, with fins and gills
800x more dense than air
High density and incompressibility constrain fish movement, give 3D world
universal solvent but dissolved oxygen is small compa