BIOL10005 Lecture Notes - Lecture 15: Water Vascular System, Symmetry In Biology, Brittle Star
1 Oct 2018
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Genetics and evolution - lecture 15 - week 8. Echinodermata: sea stars (asteroidea, brittle stars (ophiuroidea, sea urchins (echinoidea, sea lilies (crinoidea, sea cucumbers (holothuroidea) Echinodermata locomotion - tube feet: tube feet connected to water vascular system, can move independently. Chordata: marine, fresh water, terrestrial, aerial, subterranean, bilaterally symmetrical, triploblastic, coelomate, deuterostomes, partial segmentation. Monday, 10 september 2018: diversity in sub phyla, encrusting marine sea-squirts (urochordata, marine acorn worms (hemichordata, fish like lancelets (cephalochordata) #3: vertebae: surround and protect the nerve chord (spinal chord) Vertebrates - defining features: vertebrae forms around notochord, internal and elaborate skeleton (cartilage or bone, de ned head with brain-case (skull) and sensory organs. Cartilaginous fish: cartilaginous skeleton, reproduction sexual and mostly internal, embryo encased in leathery egg-case, some sharks give birth to live young. Bony (ray finned fish: rigid bony skeleton (cartilage replaced, pairs ns (ray like structure, swim bladder for buoyancy, usually a single dorsal n, incredibly diverse.
