Presentation on theme: "Anatomic Diversity Human anatomy is a typical anatomy of a member of Phylum Chordata. Human anatomy understood biologically within its comparative."— Presentation transcript:
Anatomic Diversity Human anatomy is a typical anatomy of a member of Phylum Chordata. Human anatomy understood biologically within its comparative and developmental contexts. Understanding the development of vertebrate (in this case human) anatomy is necessary to understand the adult anatomy across vertebrates.
Lampreys Class Petromyzontida 41 species Oral disc with “teeth” & rasping “tongue” Ammocoete larva - VERY similar to cephalochordates in way of life Larvae undergo metamorphosis. Marine and freshwater ectoparasites (adults) and suspension feeders (larvae)
Lampreys, Class Petromyzontida pharyngeal openings eye oral disc dorsal fins 1 narial opening keratinous “teeth”
Lampreys, Class Petromyzontida adult ammocoete larva
Lab Activity Obtain a slide of a lamprey ammocoete and a dissection microscope. Examine the slide on the microscope. If appropriate, date the page in your lab notebook and sketch the ammocoete. Label all the parts you labeled on the previous slide. Ask your instructor if you have difficulty. Examine the whole preserved lampreys.
Lab Activity Obtain a slide of a cross sectioned ammocoete larva and a compound microscope. Find the section through the post-anal tail and examine the slide on the microscope. Sketch the tail section. Label the notochord, myotomal muscles, & neural tube. Ask your instructor if you have difficulty.
Class Actinopterygii actino- = ray; ptery = fin or wing ray-finned fishes marine and freshwater 24,500+ species (= the number of species of all other vertebrates put together) Very diverse in habits and body form.
24,000 species+ sturgeons & paddlefish gars bowfin Amia calva TELEOSTS reedfishes Class Actinopterygii single, dorsal lung
Sarcopterygii sarco- = flesh; ptery = fin or wing fleshy & bony pectoral and pelvic axis lobe “fins” (NOT just FISHES) lungfishes, coelacanths, & terrestrial vertebrates