Invertebrates Flashcards
Kingdom animalia
multicellular
euakryotic
ingestive heterotrophs
motile or have a motile stage
sessile like barnacles or oysters
some parasitic - have complex life histories
grazing
capturing prey
filter feeding
symmetry in animals
spherical - in some algae
radial- can be divided multiple times symmetrically
bilateral - can only be divided once
phylum porifera
sponges
colony of cells
motile larva
sessile adult
filter feeders
mostly marine
asexual and sexual stages
can’t tolerate turbid or polluted waters
phylum cnideria
first “true” cells
nerve-cells and guts
3 cell layers
radial symmetry
have midoblasts containing stinging thread called nematocyst
2 main stages, polyp (asexual and sessile) and Medusa (motile and sexual reproduction)
Phylum platyheminthes
flat worms
cephalization
3 layers
has pharynx
has GVC
bilateral symmetry
can be parasitic
Phylum Nematoda
Unsegmented roundworms.
Complete digestive tract.
diverse
large
Phylum Nematamorpha
Less diverse
less common
Ancient traits still exist in organism (horsehail worm)
P nematoda Nematamorpha general facts
3 layers
has pseudocoelom, a liquid in between encoderm and mesoderm
Strategies for sessile and parasitic organisms in reproduction
of gametes
motile larva
hermaphrodite
complex life histories
asexual reproduction (budding and fragmentation)
Phylum Annelida
segmented worms
detrivores and omnivores
filter feeders and grazers
complete digestive tract
ceohalization
coeloms in mesoderms
earthworms and tube worms
Mollusca
Cephalization
soft bodied, shell
predators
graze
filter feeders
open circulatory system
Echinodermata
Radial Symmetry (a)
pentaradial symmetry (a)
Bilateral symmetry (b)
limited learning
slow moving
no cephalization
hydrovasculalr system
tube feet functioning like eye droppers with suction cups on the bottom
endoskeleton
spiny skin
arthropods
specialized niches
specialized segments
segmented
jointed appendages
exoskeleton made of chitin
cephalization
little asexeual reproduction
good vision
ventral nerve-chord
subphylums and classes of arthropods
SP. omychophera
SP. Crustacrea
SP. chelicerates (arachnida)
SP. uniramia (diplopoda, chilipoda, insecta)
SP. Tribbita
millipedes
2 pairs of walking legs
slow
poisonous
legs faced downwards
spherical
detrivorous/herbivores
centipedes
1 pair of walking legs
flat
venomous
legs on the side
fast
predators
Insecta
insects
most successful group of organisms
specialized niches
water restrictions - excretes uric acid
colonial
pheromones and dances as means of communication
3 segments
Arachnida
pairs of 4 walking legs
spiders and scorpions
fused cephalothorax
specialized abdomen (stings and webs)
Crustacea
marine - shrimp, lobsters, crab, barnacles
fresh water - shrimp, daphnia
Terrestrial - rolypoly, coconut crabs
