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34 Cards in this Set
- Front
- Back
know for review of lab 8. |
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OBJCTV: compare protosotome and deuterostome embryonic development |
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graphically compare protostome development with development of deuterostome |
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what is a blastopore? |
opening to the developing gut cavity |
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schizocoelous development vs enterocoelous development |
schizocoelous = protostome enterocoelous = deuterostome |
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tell what tissues are at each part (review lab 8) |
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determinate vs indeterminate cell fate |
determined: cannot be reversed or changed ie. protostome indeterminate: not yet determined. ie. deuterostome |
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spiral cell cleavage vs radial cell cleavage |
spiral = protostome radial = deuterostome |
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know main organs of visceral mass dissection (review lab 8) |
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know main organs of visceral mass dissection (review lab 8) |
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know main organs of squid dissection (review lab 8) |
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know main organs of earthworm dissection (review lab 8) |
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What phylum is this? |
Echinodermata.
"spiny skin" |
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What phylum is this / animal? |
Echinodermata. starfish larvae. |
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Understand "spiny skin" & what phylum is this? |
Echinodermata. internal skeleton of ossicles (calcite plates) and spines extend from it -> "spiny skin" |
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overview of classes of echinodermata |
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compare sea brittle to sea star |
- central disc is distinctive on sea brittle - sea brittle moves faster with long flexible arms - sea star has bumpy skin extensions - sea brittle has no suckers on tube feet - sea brittle uses tube feet for sensory instead of locomotion |
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clade asteroida example and characteristics |
sea star. - star shaped - ventral mouth - dorsal anus - tube feet with suckers for suction, feeding and locomotion - regeneration |
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clade ophiuroidea example and characteristics |
sea brittle. - central disc is distinctive from long, flexible arms - no bumpy skin extensions of sea stars - no suckers on tube feet - use for sensory instead of locomotion - regeneration |
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clade echnioidea example and characteristics |
sea urchin and sand dollars. - no arms - 5 rows of tube feet - aristotle's lantern as feeding structure - uneven sphere = sea urchin; flattened & disk-shaped = sand dollar |
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compare sea urchin vs sand dollar |
- sea urchin can move tad faster b/c can pivot spines - sea urchins are uneven spheres & sand dollars are flattened disks |
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phylum crinoidea example and characteristics |
sea lillies and feather stars. - suspension feeders - feathered arms surround dorsal mouth |
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compare sea lillies and feather stars |
sea lillies are sessile and stalked feathered stars are mobile (move with arms), lack stalks - and can swim! |
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phylum holothuroidea example and characteristics |
sea cucumber. - elongated shape - lack spines - reduced skeleton - 5 rows of tube feet - some modified as feeding tentacles - no arms |
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phylum chordata is made of: |
vertebrates & the two invertebrate groups of urochordates (tunicates) and cephalochordates (lancelets) |
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phylum chordata has the shared derived characteristics: |
1. notochord 2. dorsal hollow nerve chord 3. pharyngeal slits 4. post-anal tail 5. endostyle/thyroid gland |
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*notochord |
longitudinal flexible supporting rod b/w gut & nerve cord from the mesoderm becomes the disks b/w vertebrae in humans provides skeletal support |
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chealochrodata - lancelots
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- notochord extends past end of dorsal nerve tube - burrows in sand w/ just "head" showing - suspension feeder - adult has all 5 characteristics |
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label am amniotic egg. |
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amnion |
fluid- filled membrane that protects the embryo |
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allantois |
membrane used in gas exchange and waste removal |
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yolk sac |
nourishes the embryo |
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chorion |
encloses the embryo & all internal membranes |
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shell |
prevents dessication and allows gas exchange |
