Exam 3 Review
Review sheet areas and concepts
Terms in this set (11)
- body is platelike, has no symmetry, no organs, and no muscular or nervous system
- has a dorsal epithelium of cover cells and shiny spheres and a thick ventral epithelium with monociliated cells and nonciliated gland cells
- glide over food, secrete digestive enzymes, absorb products
-produce asexually by budding, may produce sexually
(sponges) animals with no tissue and with no definite body plan; they are sessile (they dont move), and they are filter-feeders; they contain choanocytes, which are flagellated cells that serve to keep water moving in through pores in teh sides of the body and out through a large opening at the top; other cells called amoebocytes secrete supporting structures which help hold the sponge upright, these structures can be hard, sharp, crystal-like structures called "spicules"
(ex. Jellyfish, Coral, Sea Anemones, Sea Fans), soft bodies, carnivorous animals that have stinging tentacles arranged in circles around their mouth. They are the simplest animals to have body symmetry and specilaizes tissues
free living flat worms, move by cilia, flame cell excretory system remove amonia, hermaphroditic, parthenogenic, sexual/asexual, flat for O2 exchange
tapeworms. parasites of vertebrates, scolex attaches to host. proglottids produce eggs (break off after fertilization), no head or digestive system. life cycle with >1 intermediate hosts.
roundworms; bilaterally symmetrical; cylindrical body; gut with 2 openings; many parasitic; most are aquatic; example: hookworm
(segmented worm) segmentation of body; cephalization; ceolomates; bilateral symmetry; complete digestive tract; includes class oligochaeta, class polychaeta, and class hirudinea
"soft- bodied animal" - Gastropods, cephalopods, and bivalves -2nd largest animal phylum
-very successful -make shells (enclose soft bodies) -make vast majority fossils -first to have true circulatory system -however open circulatory system -have true body cavity
-space inside organism where you can run digestive tube and other organs
A mollusk that either has a single chambered shell or no shell, and it does have a foot for movement. (ex: snail)
A member of a group of molluscs that include squids and octopus, ocean dwelling whose foot is adapted to form tentacles around the mouth
A mollusk that has two shells held together by hinges and strong muscles ex.clams, oysters, scallops.