BIOL 111 Lecture Notes - Lecture 17: Swim Bladder, Shoulder Girdle, Axial Skeleton

• School: McGill University
• Department: Biology (Sci)
• Course: BIOL 111
• Professor: Suzanne Gray

Document Summary

Filter feeding (i. e. , head cephalochordate and urochordate) Seem to be an ancestral trait in. Lecture 17 - fish: water coming in the mouth passes through slits, o2 and co2 can be exchanged across a respiratory surface = gills, gills located between slits, supported by arches deuterostomes. In vertebrates, pharyngeal tissue supported by arches (form a bases for forming an area for gas exchange and turn in jaws) Bars between the slits = gill arches: bone or cartilage, gill filaments are on the gill arches. Each arch has 2 pairs of gill filaments. Gill rakers: strain the food from going out your gills. Respiratory surfaces: must remain moist, are highly vascularized, are only 1-2 cells thick and have a high surface area. Larger surface area and more of them to transfer gases, athletes such as long distance runners have a larger lung capacity. Capillary beds in gill filaments; gas exchange.