Porifera and Cnidaria
Name two animal members of Porifera & Cnidaria?
Sponges, anemones, jellyfish, corals
Arthropods includes what type of animals?
insects, crustaceans, arachnids, myriapods
What is a defining structure all chordates have?
a notochord (most also have a backbone)
What do cnidarians not have?
boneless, brainless, eyeless, headless, mouthless
Name one way arthropods are classified
number of legs, segmented body parts, jointed legs and feet, exoskeleton
Name four marine animals in chordata.
whales, porpoises, sharks, rays, fish, sea snakes, manatees, seals, turtles
What type of symmetry do members of Porifera and Cnidaria exhibit?
Asymmetry (none); radial symmetry
What type of symmetry do arthropods exhibit?
Bilateral symmetry
What type of body symmetry do Echinoderms exhibit?
radial symmetry- mouth in the center, & the rest radiates from center
What type of symmetry do chordates exhibit?
bilateral symmetry
What is the difference between polyps & medusa?
Polyps- tenctacles wave above; medusa- tentacles dangle below
Echino and derma are Greek words. What do they mean?
echino- spiny, derma- skin
How do mammals stay warm in cold ocean waters?
blubber
What are nematocysts?
Stinging cells in Cnidarians.
Name at least two parts of an arthropod
head, abdomen, thorax, cephalothorax
What does it mean to regenerate?
the ability to grow new rays, or a whole new sea star if....
Describe the skeletons of chordates.
Inside skeleton made of bones or cartilage