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.
what are the types of arthropods
insecta
arachnida
crustacea
insecta arthropods examples
ant
grasshopper
insecta arthropods respiratory system
Spiracles (small
openings on exoskeleton where air enters)
branch into tracheal tubes (site of gas
exchange).
insecta arthropods general charcateristics
Three pairs of legs,
more species than any other phylum
combined, metamorphosis (distinct stages,
altered appearance as insect matures).
Arthropoda (Arachnida): examples
spider
scorpion
Arthropoda (Arachnida): respiratory system
Trachea or book lungs
(sheets of vascularized tissue that increase
surface area).
Arthropoda (Arachnida): general characteristics
Four pairs of legs,
terrestrial habitats.
Arthropoda (Crustacea): examples
crayfish
lobster
crab
Arthropoda (Crustacea): respiratory system
some have gills
Arthropoda (Crustacea): general characteristics
Aquatic and
terrestrial habitats.
echinodermata exmaples
starfish, sea urchin, sea cucumber.
echinodermata body symmetry
Bilateral (larvae), five fold radial
(adult).
echinodermata tissue organization
triploblasts
echinodermata circulatory system
open
no heart
echinodermata nervous system
nerve ring and radial nerves
echinodermata respiratory system
none- diffusion
echinodermata digestive system
complete- mouth and anus
echinodermata embryonic development
deuterostome
blastopore forms anus
echinodermata general charcateristics
Tube feet (suction cups
for walking and obtaining food), sexual or asexual
reproduction, closest related major phyla to
chordates. Only found in marine habitats.
