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asymmetry; no germ layers; no cephalization; no coelom; invertebrates; yellow, red tree, tube sponges; no gut
diploblastic (endoderm and exoderm); radial symmetry; acoelom and sac gut; no skeleton (hydrostatic)
in the epidermis of tentacles; delivers stinging venom that paralyzes prey and enable Cnidarins to catch their victim
Psuedocoelomates; triploblastic; one way gut; unsegmented; bilateral; invertebrate; parisitic
Where is the nerve cord and the main blood vessel in earthworms?
nerve cord- ventral; blood vessel- dorsal
Where are the nerve cord and heart in the crayfish? (protostomes)
nerve cord- ventral; heart- dorsal
Where are the main artery and nerve cord in the grasshopper? (protostomes)
main artery- dorsal; nerve chord- ventral
What does a starfish's digestive gland do and where are they found?
secretes digestive enzymes and are found in the rays right above the tube feet
How does reproductive tissue in a starfish differ in appearance from their digestive glands?
distive gland look like soggy poop and reproductive gland were pinkish and ciruclar
What 4 characterisitics are common in all chordates?
notochord, paryngeal pouches, hollow dorsal nerve chord, post anal tail
What does a notochord and gill slits provide for the embryo?
notochord: helps embryo gorw and form motor nuerons in spinal chord; gill slits: helps trap suspended food particles
Where is the nerve tissue and blood tissue in Lamprey and hagfish?
nerve tissue: dorsal; blood tissue: ventral
What is the skin like in an amphibian?
they can breathe through their skin and soak up water; slimy mucus layer
What new advances to luncgs, heart, and bones help birds to fly?
4 chambered heart- high metabolism; one way lungs- allows them to breath more air faster; acellular bones- lightweight
triploblastic; bilateral; coelom; one way gut; invertebrate; clams and octopi (bivalves and squid)
What does the water vascular system in starfish do?
moves tube feet, water, oxygen, wastes, and nutrients
triploblastic; pentaradial symmetry; one way gut; coelomate; endoskeleton, but not chordate; sea cucumbers
lamprey and hagfish
triploblastic; bilateral; one-way gut; ceolomate; chordate; vertebrate; cartilage skeleton
triploblastic; bilateral; one-way gut; coelom; chordate; vertebrate; frogs; have to reproduce in water; chordate; vertebrates
catch algae or small animals by using modified gills or other structures as nets that filter food items out of water; spend their lives in a single spot
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