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CHORDATES (features (Pharyngeal pouches (paired structures, muscular tube…
CHORDATES
features
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Pharyngeal pouches
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aquatic chordates - the sack/pouch have a long tube that leads to the outside. these structures were first used for filter feeding and later evolved into gills
terrestrial chordates - their pouches doesn't contain slits, and is able to develop to tonsils, gills and thymus gland
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Ancestral thyroid gland
structure that regulates metabolism, growth, and development
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Notochords
is a flexible, rodlike structure that extends the length of the body.
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The flexibility of the notochord enables the body to bend, rather than shorten, during contractions of the muscle segments.
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Chordates
are animals belonging to the phylum Chordata that have four distinctive features at some point in their development.
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Invertebrate Chordate
They have a dorsal tubular nerve cord, a notochord, pharyngeal pouches, a postanal tail, and, possibly, an ancestral thyroid gland.
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