BIOL 3705Chapter 3:External Fish StructuresName: Zoelle ReinkeInstructions- Complete the following handout as thoroughly as possible using your textbook and MoodlePowerpoint files to assist you.Type your answers into this document, print, and turn in by the due date.Handouts are to be completed by each student independently.Section 1:VocabularyCanine-Large conical teeth frequently located at the corners of the mouth. An example would besnappers.Molariform-Blunt and rounded grinding teeth. Also, pavement like crushing teeth. Rays have teeth likethis.Cardiform-Very small teeth that are located densely together. They would feel like sandpaper to ahuman. This helps with holding down struggling prey. An example would be a largemouth bass.Scutes-Modified scales. These scales are the ventral row of scales and they are sharp and for protection.Sturgeon have five rows of these.Annulus-The spacing between circuli will decrease in a slower growing season and it leaves behind adark band on the scale called an annulus. This typically is equal to one year’s worth of growth in the fish.
