BioD - Vertebrates

Chordates (phylum Chordata) are bilaterian an

Chordates are ________ animals (two sided symmetry)

Deuterostomia

belonging to the clade __________ (anus —> mouth formation)

notochord and nerve cord

What two cords do chordates have?

skeletal, nervous

Notochord part of the __________ system and nerve cord is part of ________ system

Notochord: flexible rod made of cartilage

Nerve cord: hollow tube

VC: flexible column of bones

notochord is a :

neural cord is a :

vertebral column is a:

notochord: flexible skeletal system

nerve cord: develops into brain / skeleton

vertebral column: surrounds nerve cord

Function of notochord:

Function of nerve cord:

Function of vertebral column:

notochord found in all chordates in embryo and in adults of lower chordates; vertebral column found only in higher chordates - vertebrates

Which animals have a notochord versus vertebral column

includes notochord, dorsal nerve cord, pharyngeal slits, and post-anal tail

Defining features of chordates

pharyngeal clefts

grooves along outer surface of larynx

pharyngeal slits

allow water to pass from mouth to outside body by passing digestive system

suspension feeding, modified gills, tetrapods do not develop slits the arches/clefts develop into ear, head and neck

function of pharyngeal slits

post anal tail

tail posterior to anus that contains skeletal elements and muscles ; provides propelling force for aquatic species