Lab 8 Flashcards
filter feeder
consume small pieces of matter sifted from water
detritovore
consuming decomposing animal and plant tissue
bilateral symmetry
defined right and left halves
two germ layers
ectoderm, endoderm,
three germ layers
ectoderm, endoderm, mesoderm
ectoderm
outer covering and nervous system
endoderm
digestive system
mesoderm
skeleton and muscles
acoelomate
solid body and no coelom
pseudocoelomate
coelom partially lined by mesoderm
coelomate
coelom completely lined by mesoderm
what is the difference between the tract and cavity of a digestive system
tract is when there are two openings with a separate moth and anus and cavity us when there is only one opening
open circulatory system
fluid passes between vessels to chambers
closed circulatory system
fluid is contained to vessels
what are the different organs that allow for gas exchange
skin
gills
lungs
what are the ways animals can remove nitrogen waste
diffusion in skin
nephridia
kidneys
hydrostatic skeleton
cavity pressurized with fluid
exoskeleton
tough external skeleton with little flexibility
endoskeleton
internal skeleton composed of bone and cartilage
what phylum have all radial symmetry
cnidaria (hydra)
what are the four characteristic features of class Mollusca
- hard external shell
- thin layer of tissue called the mantle
- a visceral mass that contains most organs
- muscular foot for locomotion
what is the purpose of the osculum in the porifera
outlet for the current of water passing through body wall
what is the purpose of the two cerebral ganglia in planaria
acts as the brain
what is the symmetry for class planaria
bilateral
