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Internal skeleton, usually bone
Endoskeleton
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External skeleton made of chitin EX. bugs, crawfish
Exoskeleton
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All the body parts radiate out from one point. Ex: starfish, jellyfish
Radial symmetry
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Two equal left and right sides. Ex. Human, horse, cow, rabbit,
Bilateral symmetry
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No body plan. Ex. sponges
Asymmetry
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has No Backbone
Invertebrate
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Has a backbone
Vertebrate
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Tiny openings in the sponges body
Ostia
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Big opening at the top of the sponge, lets water out.
Osculum
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Line the inside of the sponge and move water through the body of the sponge.
Collar cells
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Have stinging cells. Ex. jellyfish, sea anymony, hydra.
Phylum Cnidaria
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A body form in which the body form is attached to the base and has a ring of tentacles.
Polyp
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Body plan umbrella shaped tentacles hanging down. ex. jellyfish
Medusa
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Stinging cells
Cnidocytes
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flatworms, tape worms, flukes and planeria
Phylum Platyhelminthes
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allows them to detect light
eyespots
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Animal shows a head region.
Cephalization
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Free living and harmless
Planaria
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Example of Flatworm parasitic
Tapeworm and fluke
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has male and female reproductive organs
hermaphroditic
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lives inside or on its host, harmful
parasite
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segmented body. ex. earthworms and leaches
Phylum Annelida
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nerve cells in the head of an earthworm.
ganglia
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The excretory organ in an earthworm, acts like kiddneys.
Nephridia
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Round worm; ex tapeworms, heartworms, whipworms
phylum nematoda
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Mollusc soft bodies
Phylum Mollusca
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Secretes the shell
Mantle
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uses the foot to move
foot
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internal organs are located
Visceral mass
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Have to shells, or hinged shells. ex clams and oysters
Bivalve
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mollusc that have antenae on their head with eyes on them.
Gastropod
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have a head and foot area like a squid and octopus
Cephalopod
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Scraping organell inside the mouth of mollusc
radula
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Spinyskins ex: sea urchins, starfish, sand dollars
phylum Edinodermada
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allow it to suction itself to something
tube feet
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helps it to breath, helps it to eat and move
water vascular system
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Phylum Anthropoda
Characteristics
Jointed feet, segmented bodies, exoskeleton made of Chitin
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shed their exoskeleton to grow
molt
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chest and head region of spiders and crustations
cephalethorax
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compound eyes
many lenses
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Does not have many lenses, spiders have these
Simple eyes
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resperatory organs in spiders
book lungs
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tiny opening on the side of an insect that lets air into the trachea
Spiracles
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the resperatory system of an insect
trachea
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Excretory organ in crawfish
green gland
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excretory organs in insects
Malpighian tubules
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egg laying structures
Ovipositor
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Incomplete metamorphasis
egg, nymph, adult
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complete metamorphasis
egg, larva, pupa, adult
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chordates
all vertabrates
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nerve chord
spinal chord and brain
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notochord
flexable rod becomes backbone
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Pharyngeal pouches
neck, throat, or gills
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