Cockroach Lab Report - Summary For Hissing Cockroach Dissection PDF

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Hissing Cockroach dissection Introduction: In this lab students were able to perform the dissection of the hissing cockroach. The sole objective for this experiment is not only to be able to successfully dissect an insect but to be able to determine the body parts and its function of a cockroach. Students were also able to determine the sex of a cockroach. For male cockroaches there are large segmentations of the abdomen and for females there is only one large segmentation present. In the beginning of lab, students examined a live dissection of hissing cockroach, where the directions of the proper way to perform a dissection was shown and explained. To begin the dissection, the cockroach must be handled with care and be pinned at certain angles to restrain causing any damage to the roach vital structures. Thus, after following the correct procedures we were able correctly dissect, label, and determine the body parts of a cockroach. After conducting this dissection we were able to determine the sex of this cockroach which was male. Materials used for the dissection included: 1. A large tray 2. Water 3. Alcohol 4. Styrofoam sheet/piece 5. Pins 6. Dissection equipment provided by the lab, (scissors, splinter tweezers, probe) Procedure: We began by sanitize all the materials we were going to use. Then filled a big tray with water and placed a styrofoam piece in it to pin the roach on it. The experiment flowed smoothly; we were careful dissecting the Hissing Cockroach; starting with pinning the head, then cutting the exoskeleton (scernites) then the Tergites, until we reached the organs. And we to had flush the body with water to dissolve the sticky fat and in order to see the organs clearly. It was fruitful and interesting to learn the internal organs of the Hissing Cockroach, it contains sophisticated digestive systems and organs that aid it in processing the foods, breaking it down, help in absorption and excretion. Conclusion: The purpose of dissecting the Madagascar hissing cockroach was to not only identify its body parts, but also to learn how to dissect a small insect. Using water in a long tray with a small styrofoam piece to hold it in place. We learned that the hissing cockroach unlike most cockroaches, are wingless, and of course are characterized by their hissing sound. The sound is produced when they forcibly expel air through the spiracles (specially-adapted respiratory openings). Madagascar cockroaches can be kept as exotic pets, though because of their tendency to climb, the living space provided for them must be tested to see if they can climb it as they would/should in a natural environment. Body parts identified included the following: Crop, Heptatic caecae, Esophagus, Pharynx, Malpighian tubules, Colon, Ileum, Salivary glands, Gizzard, Rectum, Mesenterons

Questions and Answers 1. This Hissing cockroach is a male due to the three segmentations in the abdomen. 2. The G.Portenosa is the species name for the Hissing cockroach. Taxonomy Kingdom: Animalia Phylum: Anthropoda Class:Insecta Order: Blattodea Family: Blaberidae Genus: Gromphadorhina Species: G.portenosa 3.The function of the pharynx is to help aid in digestions and in the respiratory system. The esophagus assists in the digestive system. The salivary gland secretes saliva to breakdown the food it eats. The crop is for food storage. The Hepatic caecae secretes enzymes to help digest food. The Gizzard grinds the food .The mesenterons is the main sight for digestion and absorption. The Malphiglan tubules absorb water and waste. The ileum assists in the absorption of vitamins. The colon reabsorbs the fluids and processes the waste. The rectum removes water from feces. 4. The hissing cockroach lives in tropical subtropical climate, they feed on fruits and plants. Their incidence is hissing. 5. A behavioral adaptation of this species would be that they hiss to repel predators.

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