BIOL 3705Chapter 4: Internal Fish AnatomyName: Zoelle ReinkeInstructions- Complete the following handout as thoroughly as possible using your textbook and Moodle Powerpoint 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: VocabularyAfferent branchial artery- brings in oxygen deficient blood to the gills from the ventral aorta. Spiral valve- Thismakes is able for the surface area of the intestine to increase by lots of folding. Sometimes it looks like a spiral staircase. Caudal artery- in the posterior of the body this is where the dorsal aorta turns into the caudal artery. Thedorsal aorta is the main route of transport of oxygenated blood from the bills to the rest of the body. Pyloric caeca- fingerlike projections that connect to the intestine and many times function in absorption or digestion. Fish can have a few or thousands.Pneumatic duct- This is a connection between the gas bladder and the gut.Section 2: Fill in the blankA decrease in pressure within the swim bladder can cause the swim bladder to expand to a large size, impacting the ability of a fish to swim.