Evaluate Basic External Animal Anatomy and Morphology - AgriSETA

Evaluate Basic External Animal Anatomy and MorphologyPrimary Agriculture NQF Level 1 Unit Standard No: 11617311oThe eyesThere are two eyes without eyelids, one on each side of the head.Each eye is covered and protected by a thin transparentepidermis (thin transparent skin).oThe nostrilsUsually there are two external openings of the nose above themouth. The nostrils are used for smelling. The sense of smell iswell developed.oThe gills• The trunkBetween the head and trunk are two bony gill covers, one oneach side. They cover the gills and protect them. The gills are therespiratory organs of the fish.The largest part of the body is the trunk and the following anatomicalfeatures can be distinguished.oThe cloacaeBoth the digestive tract and the ureters (the ducts from the"kidneys") of the fish end in the cavity of the cloacae (externalopening of the digestive and urinary tract). The opening issituated at the rear end on the underside of the trunk.oThe lateral lineThe lateral (on the side) line extends on either side of the trunkof the fish. The lateral line serves as a gauge for the fish toorientate the fish according to its depth in the water.oThe finsThe fins of a fish represent the limbs of other vertebrate animals.There are two types namely, paired and unpaired fins. The finsserve as locomotor (help the fish to swim) organs.* The paired finsThere are two pairs of paired fins:- The pectoral finsThese fins are situated just behindthe external gill slits on the side ofthe trunk.Version: 01 Version Date: July 2006