Objectives:
1. List 5
characteristi
cs common
to
invertebrate
chordates.
2. List and
draw the 2
most
common
types of
invertebrate
chordates.
Invertebrate Chordates
Common Characteristics
Endoskeleton
Notochord: Stiff rod along the back of the
animal. The notochord is attached to muscles
necessary for support and locomotion. (Similar
in function to our backbone).
Hollow Dorsal Nerve Cord: Travels the length
of the body.
Pharyngeal Slits: Found along the walls of the
pharynx (which is a muscular tube that
connects the mouth to the digestive tract).
Postanal Tail
http://www.flickr.com/photos/31049701@N00/181883261/
Classes of Chordates
#1 Vertebrata: vertebrates
#2 Urochordata:
1. Invertebrates
Notocord, nerve cord, and postnatal tail found
only in the embryo stage.
1) Tough skin called a tunic cover the body.
2) Reproduction: Sexual Hermaphrodites
Asexual Budding
Example: Tunicates
#3 Cephalochodata:
1.Fish-like shape
2.Example: Lancelet
1