chapter 33, quiz 1

individuals that are male and female

in the interior of spongocoels. cells that are shaped like choanoflagellates, generate current with flagella and help Porifera filter feed by particles getting stuck in the collar

cells that move through a sponge’s mesohyl which digests food from choanocytes, distribute nutrition, manufacture touch skeletal fibers, and can become other sponge cell types

the pores in the central cavity of a sponge where water is drawn in to filter feed

a large opening in a sponge where water flows out during filter feeding

a sac with a central digestive compartment. only has one opening for mouth and anus

cells that contain cnidae (capsule-like organelles that can expand outward). are on the tentacles of cynrdarians and help capture prey and defend

organism that stays in one place

specialized cnidae that have a stinging thread and can puncture prey

a type of asexual reproduction where females produce unfertilized eggs which are only female

a rough, tongue-like, organ used by Mollusks to scrape up food

metamorphosis where the babies and adults look completely different

where babies and adults look similar, just bigger

fluid in open circulatory systems that is propelled by heart into small arteries and then into the hemocoel

the body cavity surrounding tissues and organs

branched air ducts leading into the interior of the body from pores in the cuticle

the hard outer covering on Ecdysozoa

an external respiratory opening

one of the extensions of echinoderm’s water vascular system. function in locomotion and feeding

an internal skeleton

floating medusa and sessile polyp

Platyhelminthes

intermediate: snails. definitve/terminal: humans.

muscular foot (for movement), visceral mass (main body part with most organs), mantle (layer of tissue over visceral mass that secretes shell)

cephalopods have a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head

a hair-like structure that draws in water and food for nutrition

polychaeta have a parapodia which act as little legs and more chaetae (bristles made of chitin) per segment

the coelom is well developed and complex, and the body is segmented (specialized/ doing different jobs)

segmented bodies, hard exoskeleton, jointed appendages

advantage: gives them durability and protection

disadvantage: limited movement and does not grow with them (molting leaves them exposed)

head, thorax, and abdomen. wings are made from cuticle. 3 pairs of walking legs

antennae (insects have one pair, crustaceans have two)

a group of mostly sessile crustaceans whose cuticle is hardened into a shell containing calcium carbonate

echinodermata and chordata

water vascular system (its a network of hydraulic canals branching into extensions called tube feet-function in locomotion feeding and gas exchange)