Stanford scientists make major breakthrough in regenerative medicine
..., like humans, belong to a group of animals called
chordates (organisms with some level of spinal cord development), and many scientists believe that sea squirts approximate what the very first human chordate ancestor may have been like 550 million years ago. By studying this modern day representative of our e...
Nervous system
...ommonalities in embryonic development among all
chordates , the tunicate brain is believed to resemble the evolutionary precursor of the vertebrate brainstem . See also neuroscience zootomy...
Vertebrates
...hordata During their embryo nic development, all
chordates pass through a stage called the pharyngula [View] with these features: ... Full article >>> Vertebrates , and a few in vertebrates , have a closed circulatory system . Closed circulatory system s (evolved in echinoderms and vert...
Tunica
...ventral surface of the pharnyx of non-vertebrate
chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Full article >>> sedentary -- Living in a fixed location, as with most plant s, tunica tes, sponges, etc. Contrast with motile. sediment -- Any sol...
Thyroid gland
...#62;>> of the pharnyx of non-vertebrate
chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Recent molecular evidence supports the traditional view that the endo style is homologous to the vertebrate thyroid gland . Full article >>>...
Style
...ventral surface of the pharnyx of non-vertebrate
chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Recent molecular evidence supports the traditional view that the endo style is ... Full article >>> Style s of art that flourished during this shor...
Strain
...ock. Full article >>> In primitive
chordates the pharyngeal slits are used to strain water and filter out food particles; in fishes they are modified for respiration . Most terrestrial vertebrates have pharyngeal slits only in the embryo nic stage. Full article >>> Insect ...
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Scientists Make Major Breakthrough in Regenerative Medicine
..., like humans, belong to a group of animals called
chordates (organisms with some level of spinal cord development), and many scientists believe that sea squirts approximate what the very first human chordate ancestor may have been like 550 million years ago. By studying this modern day representative of our e...