Lesson 24 Terms Flashcards
Anadromous
the animal is hatched in fresh water and then migrates to salt water as an adult
Cartilage
strong connective tissue that supports the body and is softer and more flexible than bone
Class Agnatha
jawless fish
Class Amphibia
amphibian
Class Aves
birds
Class Chondrichthyes
cartilaginous fish; sharks, skates, rays
Class Mammalia
mammals
Class Osteichthyes
bony fish
Class Reptilia
reptiles
Dorsal hollow nerve cord
a bundle of nerve fibers running down the back
Electroreception
sense electrical signals underwater; used to locate prey
Endoskeleton
an internal frame made of bone or cartilage that provides support for the body
Gastrointestinal tract
includes mouth at the anterior end of the animal and an anus at the posterior end
Notochord
a rod-shaped structure that provides skeletal support; typically develops into a backbone
Operculum
large flat gill covers that protect the gills
Pharyngeal slits
connect the inside of the throat to the outside of the neck; develop into gills in aquatic animal
Post-anal tail
an extension of the body past the anal opening
Spawning
reproductive behavior; producing of eggs
Spinal cord
a hollow tube of nervous tissue
Subphylum Cephalochordata
lancelets
Subphylum Urochordata
tunicate
Subphylum Vertebrata
vertebrates
Urogenital opening
opening where sperm and egg cells are released
Vertebral column
backbone with a hollow tube of nervous tissue, known as the spinal cord
