Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
lophophorates (from group lophotrockozoa)make up what three groups? |
Byozoa (moss animals) phoronida(horseshoes worms) Brachipoda(lamp shells) |
|
|
charateristics of lophotrochozoa |
-havea crown of hollow cilliated tenticles (lophophore) -have a spinning top larva- (trochophore) |
|
|
characteristics of trochophore larva |
havea spinning top covered in wheel-shaped bands of cilia - how they control direction of movemnt -by moving cillia rsapdly and producing water eddies - and eddies also push food particles closer to the mouth -food includes- plankton , yolk content of cells laid from when they were an egg -no body cavity - 2 excretory organs (protonephridia) -apical sense organ at top of spinning top and has nerve strads - also spouts apical tuft (cilia) -sack-like stomach form - mulluscs and annelids |
|
|
the lophophore organ |
a ring of hollow tenticles(extension of coelom) covered in cilia surrouding mouth -tenticles can be aranged in coiled or horese-shoe shape -gut is U-shaped- anterior mouth at the centre of the lophophore -anus lies dorsally to the mouth (also often surrounded by tenticles) - in bryozoans ( anus is outside of lophophore) form- bryozao, phoronida,brachipoda |
|
|
general features of brachiopod, bryozoan, phoronid |
-marine and freshwater suspension feeders -solitary of colonial -living in exoskeleton- fprms shell or tube -feeds through lophophore- -gas exchnage through lophophore -biparte or triparte body- coelomic cavities no distict head region -u shaped gut - distcint mouth and anus (inside or out) |
|
|
phoronid develoment and general charatceristics |
larva elongated to form u shaped gut - becomes tube like- -lophophore becomes ciliated and hollow -started off as wormlike but then becme long and lived in seafloor for protection characteristics- - criwn shaped or horseshoe-shaped lophophore -solitary -hollow tenticles -u shaped gut -no anus -nervous ganglion between mouth and anus -sometimes havea heart and heamaglobin-blood vessels -2 large nerves running down side of body -protostome - |
|
|
lophophorate larva |
share some triats with mulluscs and annlid larva- drown of holow lophophore covered in tenticles covered with cilia |
|
|
bryozoa charatceristcis |
- o/u shaped lohpohpore -hollow tenticles can be extruded of retracted - 3 part body plan and coelom - u shaped gut multi-ciliated cells in epithelum -animal lives inside theca -mostly colonial -mostly marine -anus outside lophophore - individuals tiny but form colonies via budding |
|
|
brachiopod characteristics |
-coiled lophophore (filter feeding) - anus absent or present -u shapoed gut -marine -radial cleavage -dorsal and ventral hinged valvues -fleshy muscular pedicle for attachemnt to substrate -shelsecreting mantel |
