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Chordates (Dorsal Tubular Nerve Cord (Invertebrates- Remains the same,…
Chordates
Dorsal Tubular Nerve Cord
Invertebrates- Remains the same
Vertebrates- Becomes brain at anterior & spinal cord at anterior
It's tube-shaped sound on dorsal side
Notocord
Flexible structure that extends length of the body
Vertebrates- Eventually replaced by cartilage & bone
Invertebrates- Remains the same
Pharyngeal Pouches
Vertebrates- Either develop into gills in aquatic or tonsils in terrestrial for gas exchange
Invertebrates- Remains as filter feeders
connect the muscular tube that links the mouth cavity and the esophagus.
Postanal Tail
Used for locomotion. Extends beyond anus.
Nonchordates- Contains parts of digestive system
Chordates- Contains muscles
Thyroid Glands
Regulates metabolism & growth
Vertebrates- Secret mucus to trap food that aids in filter feeding
Invertebrates- Have endostyle that secrets proteins similar to the ones created in invertebrates