Terms : Hide Images
| 1932645030 | invertebrates | animals that lack a backbone | 0 | |
| 1932645031 | filter feeders | filter out food particles suspended in the surrounding water as they draw it through their body | 1 | |
| 1932645032 | spongocoel | The central cavity of sponges that water passes into | 2 | |
| 1932645033 | choanocytes | collar cells, engulf other bacteria/particles by phagocytosis | 3 | |
| 1932645034 | mesohyl | a gelatinous region between the two layers of cells of a sponge | 4 | |
| 1932645035 | amoebocytes | Cells that move using pseudopods and perform different functions in different animals | 5 | |
| 1932645036 | hermaphrodites | individual functions as both male and female in sexual reproduction by producing sperm and eggs | 6 | |
| 1932645037 | gastrovascular cavity | in cnidarians, central digestive compartment | 7 | |
| 1932645038 | polyps | cylindrical forms that adhere to the substrate by the aboral end of their body and extend tentacles to trap prey | 8 | |
| 1932645039 | medusa | flattened, mouth-down version of the polyp | 9 | |
| 1932645040 | cnidocytes | A specialized cell for which the phylum Cnidaria is named; consists of a capsule containing a fine coiled thread, which, when discharged, functions in defense and prey capture | 10 | |
| 1932769594 | nematocysts | Specialized organelles within cnidocytes that eject a stinging thread | 11 | |
| 1932769595 | exoskeleton | hard external skeleton made of calcium carbonate | 12 | |
| 1932769596 | protonephridia | an excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings | 13 | |
| 1932769597 | planarians | Phylum Platyhelminthes, Class Turbellaria, eyespots on the head contain photoreceptors and gastrovascular cavity with single opening on underside of body | 14 | |
| 1932769598 | alimentary canal | a digestive tube with 2 openings | 15 | |
| 1932769599 | parthogenesis | used by rotifers, , reproduction that consists of only females that produce more females from unfertilized eggs | 16 | |
| 1932769600 | Ectoprocts | colonial animals that superficially resemble clumps of moss, part of Lophophores | 17 | |
| 1932769601 | Brachipods | lams shells, resemble clams/hinge shelled molluscs, part of Lophophores | 18 | |
| 1932769602 | foot | used for mollusk movement | 19 | |
| 1932769603 | visceral mass | contains most of the mollusk internal organs | 20 | |
| 1932769604 | mantle | fold of tissue that drapes over the visceral mass and secretes a shell (if present) | 21 | |
| 1932769605 | mantle cavity | houses gills, anus, and excretory pores | 22 | |
| 1932769606 | radula | strap-like organ, scrapes up food | 23 | |
| 1932769607 | ammonites | Shelled cephalopod animals that were the dominant invertebrate predators for millions of years ending with the mass extinctions at the end of the Cretaceous period | 24 | |
| 1932769608 | cuticle | tough external coat | 25 | |
| 1932769609 | molting | Process in which an arthropod sheds its exoskeleton and manufactures a larger one to take its place | 26 | |
| 1932769610 | open circulatory system | hemolymph is propelled by a heart through short arteries and then into spaces called sinuses surrounding the tissues and organs | 27 | |
| 1932769611 | chelicerates | part of arthropods, sea spiders, horseshoe carbs, scorpions, ticks, mites and spiders | 28 | |
| 1932769612 | myriapods | centipedes and millipedes | 29 | |
| 1932769613 | pancrustaceans | insects, lobsters, shrimp, barnacles, other crustaceans | 30 | |
| 1932769614 | celicerae | claw-like feeding appendages, serve as pincers/fangs | 31 | |
| 1932769615 | eurypterids | water scorpions, part of chelicerates | 32 | |
| 1932769616 | book lungs | stacked plate-like structures contained in an internal structure, used for gas exchange | 33 | |
| 1932769617 | incomplete metamorphasis | type of insect development characterized by a similar appearence throughout all the stages of the life cycle: egg, nymph, adult | 34 | |
| 1932769618 | complete metamorphosis | Insect development consisting of four stages: egg, larva, pupa, and adult | 35 | |
| 1932769619 | echinoderms | A member of a group of slow moving or sessile marine animals characterized by a rough or spiny skin, a water vascular system, an endoskeleton, and a radial symmetry in adults, with examples such as sea stars, sea urchins and sand dollars | 36 | |
| 1932769620 | water vascular system | A network of hydraulic canals unique to echinoderms that branches into extensions called tube feet, which function in locomotion, feeding, and gas exchange | 37 |
