BIOL 1202 Chapter : BIOL 1202 Exam 4 Ch 33, 34, 40 And 41
Document Summary
Terms in ch 32 should be familiar with. Animals are what we call metazoans, includes that is very simple and their organized at cellular level, borderline b/w colonial single celled organism and a multicellular organism. Eumetazoans- true animals, have organization at tissue level and above: cnidarians, Sponges: suspension/filter feeders, filter water passing through their bodies, draw water into body, then filter out food particles from water meso-matrix of cells called spicules, this is amoebocytes (move by pseudopodia) deliver nutrients and secrete. Choanocytes: line the spongocoel ; movement of flagella up water flow. Have the outer layer of cells, embedded in them are porosities, which are donut shaped cells that span through body wall and water flows in through porosities and into spongocoel, (large opening in the middle of sponge) B/w outside and spongocoel inside is a area called mesohyl, which is matrix of cells called spicules, protein fibers and such,
