Tiêu đề Laboratory Activity 1 - Dissection: The Whole Body.pdf ✅

Republic of the Philippines LEYTE NORMAL UNIVERSITY Tacloban City ANATOMY AND PHYSIOLOGY (LAB) Laboratory Activity No. 1 Dissection: The Whole Body I. Learning Goals In this activity, you are expected to do the following: 1. Perform whole body dissection of vertebrate animal; and 2. Identify the major anatomical features of the vertebrate body in a dissected specimen. II. Materials • Preserved (plain or double injected) or fresh lab rat (or similar vertebrate) • Dissection tools and trays • Protective gear: gloves, safety eyewear, and lab gown III. Procedure Observing External Structures 1. Obtain a preserved or freshly killed rat (one for every two to four students), a dissecting tray, dissecting pins, scissors, forceps, and disposable gloves. Bring these items to your laboratory bench. 2. Don the gloves before beginning your observations. This precaution is particularly important when you are handling freshly killed animals, which may harbor internal parasites. 3. Observe the major divisions of the animal’s body— head, trunk, and extremities. Compare these divisions to those of humans. Examining the Mouth (Oral Cavity) 1. Examine the structures of the mouth or oral cavity, the most superior part of the digestive system. Identify the teeth and tongue. Observe the hard palate (the part supported by bone) and the soft palate (immediately posterior to the hard palate and with no bony support). Notice that the posterior end of the oral cavity leads into the throat, or pharynx, a passageway used by both the digestive and respiratory systems. Opening the Ventral Cavity 1. Pin the animal to the wax of the dissecting tray by placing its dorsal side down and securing its extremities to wax (see Figure 1a).