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floridae Feature purebreds Tail Pigment Never Appears Anterior Pigment Spot From Early Larva Larval Mouth Opposite Club-Shaped Gland Preoral Ciliated Pit (4) 17 [+ or -]0.9 [micro]m Gill Slit 1 Deflection (5) 61 [+ or -] 4.6[degrees] Gill Slit 2 Deflection (5) 26 [+ or -] 5.0[degrees] Right Anus Deflection (5) 26 [+ or -] 5.0[degrees] Right B.
6L, single arrow), and the single gill slit still opens from the pharyngeal lumen just to the left of the ventral midline (Fig.
Stomochord with a vermiform process; pericardium and glomerulus with paired anterior diverticula more or less developed Spengeliidae (a) Liver sacs and synapticles present; gill slits almost equaling the pharynx in depth, so that the ventral, non-pharyngeal part of the pharynx is reduced to a mere groove; nerve roots absent; pericardial diverticula long Schizocardium, Spengel (1893) (b) Liver sacs absent; ventral part of pharynx well developed; pericardial diverticula short (i) Synapticles and nerve roots absent, (a) Peribuccal spaces Willeyia, Punnett (1903) ([beta]) Without peribuccal spaces Glandiceps, Spengel (1893) (ii) Synapticles present; nerve roots present or absent; genital region with dermal pits Spengelia, Willey (1898) B.
Why do human embryos develop gill slits they never use for respiration?
Answers: nouns: gill slits, cartilage, lateral lines, prey; adjectives: keen, shallow, endangered, extinct Students will choose and define two new terms in their own words.
The ventral position of the mouth and the presence of the gill slits, instead of gills like those of fish, complete their typical appearance.
Some had red grinning mouths and red, comma-shaped gill slits. A few, like the Pikies, had a big metal lip designed to make them dart back and forth and wiggle around when you reeled them in.
A familiar example is the pharyngula stage of vertebrates, with a notochord, hollow dorsal nerve cord, segmented somites, and pharynx with gill slits. The early and late differences between, say, a sparrow and a codfish are easy to explain adaptively: early differences arise, in part, because of differences in the amount of yolk in the egg, and later differences are imposed by the problems of living in air or water, respectively.
We could regard the single fertilized cell as comprising a person, or we could select the point at which the fetus has a tail and gill slits and looks much like any other species at a similar point of embryological development.
When a potential fish host consumes a conglutinate, the conglutinate breaks apart, and glochidia passing through the gill slits have the opportunity to attach to the gill filaments.
He'd barely lost the trace of gill slits and already he was a member of the clan of crossings.
They share a cartilaginous skeleton 6 that is, one with no bones, just cartilage 6 and gill slits (usually five).