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Unit 10 – Dissection Fetal Pig Dissection and Basic Body Organization Required Materials: Gloves Fetal pig Goggles Dissecting tools / Instrument Box Dissecting pan with a wax bottom Rubber bands/ threads Assignment 1 External Features (Figures 10.1to 10.3) The pigs have been preserved in formalin, and then stored in a proprietary preservative fluid. This fluid is not as toxic as formalin, but you still need to wear gloves and goggles when handling the specimens. Work in groups and ensure that you see pigs of both sexes! 1. Obtain a pig and place it in a dissection pan. 2. Locate the following positions: Superior Cranial Anterior Dorsal Median Inferior Caudal Posterior Ventral Lateral 3. Locate head, neck, trunk, tail, and abdomen. 4. Examine the head. Locate External Ear, Eye lid, Nose and Mouth 5. Locate the fore limb and hind limb. 6. Locate Shoulder, Hip, Elbow, Knee, Wrist, Umbilical Cord and Anus 7. Determine the sex of the pig. Assignment 2 Internal Anatomy (Figures 10.6 to 10. 9) The purpose of dissection is to expose the various organs of an animal for study. You must understand that dissecting must be accomplished with the most minimal damage to the specimen. Make sure you use the protective gloves given to you by your instructor. In addition, wash your hands thoroughly after lab class activity. Before you begin your dissection to examine the internal anatomy of the fetal pig, you must position it in the dissection pan as seen in Figure 10.4. Draw the lines with marker pen (Figure 10.5). Make incisions by following those lines in sequence. After making the incision and exposing the thoracic and abdominal cavities, you will locate the following organs: Tongue External/Internal Nares Palate Esophagus Trachea Epiglottis Larynx Thoracic Cavity Ribs Heart Pericardium/Pericardial membrane Diaphragm muscle Abdominal Cavity Liver Gall Bladder Stomach Spleen Pancreas Small Intestine Large Intestine (Colon) Rectum Kidney Bladder (urinary) Umbilical cord Lung U10 - Fetal Pig Dissection Name____________________ **Before you begin filling out this lab report you must complete Assignments 1 & 2. After Performing Assignments 1 & 2 in class, you must complete Assignments 3 to 6 as given below. You can use your notes and lab sheets to complete the information below. Assignment 3 Match the following terms: ____ 1. Separates thoracic and abdominal cavities a. heart ____ 2. Toward the belly side b. spleen ____ 3. Large pump which pumps blood c. stomach ____ 4. Organ located within the abdominopelvic cavity d. ventral ____ 5. Organ located directly below the stomach e. diaphragm muscle Assignment 4 Fill in the blanks: 1. What is the function of the Digestive system? 2. What is the function of the urinary system? 3. What is the function of the respiratory system? 4. Name the system that is associated with delivery of oxygen, nutrient molecules, and hormones and the removal of carbon dioxide. 5. Name the structure that is involved in blood filtration. Assignment 5 Name the system in which these organs are located: 1. Liver 2. Heart 3. Lungs 4. Kidneys 5. Esophagus 6. Bladder 7. Diaphragm muscle Assignment 6 Complete these sentences: 1. The ________________________ connects the fetus to the placenta of the mother. 2. The heart is located on the ____________________ side of the body. 3. The covering of the heart is called _______________________________________. 4. The function of the spleen is _______________________________________________________. 5. The diaphragm muscle is found on the underside of the ___________________. 6. Which organ is where digestion of food and absorption of nutrients? ____________ and _______________________ 7. The function of the kidney is _______________________________________________________. 8. Anatomical orientation towards the back of the body is __________________________________.