Biology Lecture ch 33 Vocab


Pentaradial symmetry


symmetry in 5 or multiples of fivechanged from the bilateral symmetry larva


water vascular system


a unique feature of the echinodermsa network of water-filled canals leading to extensions (tube feet)madreporite -> ring canal -> radial canal -> tube feet


Tube feet


extensions used for locomotion, gas exchange, and feeding


notochord


most distinct chordatescomposed of a core of large cells with fluid filled vacuoles making it rigid and flexible


Vertebrates


have jointed vertebral column


vertebral column


in the dorsal cavityreplaces the notochord during early development


tetrapods


the four legged vertebrates


amphibians


the adaptation of water bound animals to terrestrial animalsmust stay in moist environments to stay alive


culture


the knowledge and traditions that are passed along from one generation to the next by teaching and observation