ch 9.2- diversity of life Flashcards
annelida examples
earthworm
leech
annelida body symmetry
bilateral
annelida tissue organization
tiploblasts
annelida circulatory system
Closed circulatory system
(blood pumped through vessels by heart), multiple
pairs of aortic arches, distinct arteries and veins.
no HEART there is a dorsal vessel that acts as a heart
annelida nevrous system
Ventral nerve cord, anterior
ganglia (brain).
annelida respiratory system
none- diffusion
annelida digestive system
Alimentary canal, mouth and
anus.
annelida embryonic development
protostome
balstopore forms mouth
annelida general characteristics
The first phyla to
develop segmentation. Segmented bodies, coelom
is divided by septa, sexual (hermaphrodites) and
asexual (regeneration) reproduction, longitudinal
and circular muscles.
mollusca exmaples
clam, snail, slug, squid, octopus, cephalopod,
gastropod.
mollusca body symmetry
bilateral
mollusca tissue organization
triploblasts
mollusca circulatory system
Open; contains hemocoel, a
space inside an organism where hemolymph
(similar to blood) freely flows around organs.
mollusca nervous system
Ventral nerve cords and brain.
molluscsa respiratory sytstem
gills
mollusca digestive system
Complete (alimentary canal
and accessory glands), mouth and anus, radula
(tongues covered in tiny teeth - unique to
mollusks).
mollusca embryonic devleopment
protostome
arthropods body symmetry
bilateral
arthropods tissue organization
triploblasts
arthropods circulatory system
Open (hemocoel and
hemolymph).
arthropods nervous system
Fused ganglia (masses of nerve
tissue), ventral nerve cord.
arthropods digestive system
One-way digestion, some have
salivary glands.
arthropods embryonic development
protostomes
arthropods general charcateristics
Most diverse phylum,
has the highest number of different species,
exoskeleton of chitin, jointed appendages,
segmented bodies.
