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26 terms

Chapter 17 Biology

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porifera
These are sponges that are sessile and asymmetrical
and are made up of collagen and sphericals
porifera
can regenerate and are hermaphrodites
cnidarians
these have 2 body types and only one opening
polyp
1 type of cnidarian that is a sessile hydra
medusa
1 type of cnidarian that is motile and is a jellyfish
cnidarians
can perform both asexual and sexual reproduction (process called budding), possess cnidocytes (stinging cells) and has a nervous system (nerve net)
cnidarians
have a sac gut
the only invertebrate with radial symmetry
flatworms
are Platyhelminthes that are parasites (found in host cells)
flatworms
have a central/advanced nervous system,an eye spot, bilateral structure and are hermaphrodites
roundworms
AKA Nematodes:
sexual reproduction only
2 openings (complete digestive tract)
annelids
earthworms/leeches: segmentation
esophagus, pharnyx, crop & gizzard
with 2 openings
annelids
closed circulatory system (and have a heart)
ventral nerve cord
have sensory antennae (more advanced nervous system)
arthropods
crabs and insects:
have an exoskeleton made of chitin (for support)
has 3 separate body regions: head, thorax and abdomen
arthropods
has book lungs and external gills with an open circulatory system
dorsal
back
ventral
front
anterior
top
posterior
bottom
flatworms
which type has an eyespot?
annelids
which type has a closed circulatory system?
arthropods
which type has an open circulatory system?
cnidarians
which were the first to become motile?
cnidarians
which type has stinging cells?
sessile
cannot move
animal
which kingdom?
· Heterotrophs (never photosynthetic)
· Eukaryotes
· Multicellular
· Sexual Reproduction
· Gas exchange
· Inverts- verts (no backbone)
cnidarians
everything has bilateral symmetry EXCEPT?