Evaluate Basic External Animal Anatomy and Morphology - AgriSETA

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Evaluate Basic External Animal Anatomy and MorphologyPrimary Agriculture NQF Level 1 Unit Standard No: 11617334The locust breathes through ten pairs of spiracles: two pairs on thethorax and eight pairs on the abdomen. From these openings acomplicated system of air tubes (tracheae) extends throughout thebody. If you observe a locust at rest, you will see the lower part of theabdomen moving up and down. In other insects like the honeybees, itis also very visible. These movements pump air in and out of thespiracles.Life cycle of the locustConceptIdentifying the different basicanatomical parts of a locust.Identifying by means of external partsthe class to which the locust belongs.Identifying and naming the externalvisible divisions or parts of a locust.Identifying gross abnormalities in theexternal parts of locust.Giving reasons for the various steps inthe lifecycle and identifying thevulnerability of the locust in thedifferent stages.I understandthis conceptQuestions that I still wouldlike to askVersion: 01 Version Date: July 2006
Evaluate Basic External Animal Anatomy and MorphologyPrimary Agriculture NQF Level 1 Unit Standard No: 116173352.2 CrustaceaThe Crustacea are well known animals and spend most of their lives in water. Theyinclude animals like lobsters and crabs. We will study the crab.The Crab HabitatWe find crabs in the sea and in various fresh water rivers, dams, pools andplaces where there is constant water. Body divisionsThe body of a crab is divided into two clearly defined regions, thecephalothorax (cephalo = head / thorax = chest - meaning the head andchest parts are one) and the abdomen (the part of the body that liesbetween the chest (thorax) and the beginning of the legs (pelvic area)).The abdomen is folded in under the cephalothorax. The crab has acalcareous (hard calcium rich) exoskeleton (hard structure on the outsideof the body). The body wall is not hardened in certain areas and will allowlittle movement. Movement can take place at the joints of the legs andbetween the segments of the abdomen.• The cephalothoraxThe head and thorax are fused together to form the cephalothorax thatmakes up the upper part of the body. It is broad and flattened from topto bottom. The upper part (surface) of the cephalothorax is coveredwith a shell like shield called the carapace.The following can be found on the cephalothorax:oThe antennaeIn the middle of the cephalothorax at the front are one pair oflong antennae and one pair of short antennae. They serve asorgans of touch and smell.Version: 01 Version Date: July 2006
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