TRAITS animal bio lab final

porifera, cnidaria, ctenophora, platyhelminthes, mollusca

Porifera (internal/ symmetry/ movement/ feeding)

• pore bearing

• no organs or tissues

• body symmetry: none or radial

• sessile

• filter feeding via phagocytosis

sponge cell types

• pinacocytes

• choanocytes

• archaeocytes (amebocytes)

• porocytes

• spongocytes: secrete spongin

Cnidaria symmetry, internal, skeleton, cells

• radial

• diploblastic (outer epidermis, inner gastrodermis, also mesoglea)

• gastrovascular cavity

• hydrostatic skeleton

• Cnidocytes (stinging cells)

Ctenophora traits

• comb jellies

• do not sting

• cilia to swim

• complete digestive

• capture food with colloblasts

Platyhelminthes type, symmetry, nervous, digestive, respiratory, circulatory, support, reproduction

• triploblastic

• bilateral

• acoelomate

• cephalization

• nerve cords

• incomplete digest (gastor cavity)

• no respiratory

• no circulatory

• no skeleton / muslce fibers

• monoecious a few dioecious (exual and asexual)

mollusca nervous, respiratory, circulatory, digestive, reproduction, excretory

• brain, nerve chords

• respiratory: gills

• closed circ in cephalopods but open in other classes

• complete and complex digestive

• dioecious mostly

• kidneys