Lab - Pig Heart Dissection by KQp8n3l0

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									Name _____________________________________ Period __________ Date ____________
                                        Lab: Pig Heart Dissection
Background Information: The pig (porcine) heart is interesting to us because it is very similar to the
human heart in anatomy, size and function. Its excellent availability in most areas of the world, along
with the similarities to the human heart, make porcine heart tissue ideal for transplant into humans. Of
course, untreated porcine tissue would be rejected very quickly by the recipient’s body, in the same
way that a human’s donated organ would be rejected. To prevent this, porcine heart valves are treated
with glutaraldehyde to reduce their immunogenicity.The porcine heart, like a human heart, has four
chambers and four valves. Blood flows through the pig heart in the same manner as through a
human’s.
Materials / Safety: Obtain a preserved pig heart, a dissecting tray, dissecting instruments, a lab
manual, and gloves. Gloves must be worn whenever handling the heart to protect your hands from the
chemicals used as preservatives. A pig heart will be provided, and each participant is expected to
dissect the heart as they work in groups of three. Please take care to follow the safety guidelines as
explained by your teacher.
External Anatomy: Follow the instructions on p. 93 and refer to the photos on pp. 94-95 of your lab
manual. Note that each heart is a little different, and has been prepared a little differently. Some of the
major vessels may not be obvious, but at a minimum you should be able to find where all major vessels
enter or exit the heart chambers.
Internal Anatomy: Your teacher will direct you to follow one of these procedures. Be sure to identify all
structures according to the instructions in your lab manual. Then switch specimens with another group.
    1. Coronal Plane: Follow the instructions on p. 96 and refer to the photo on p. 97.
    2. Right & Left Sections: Follow the instructions on p. 98 and refer to the photos on pp. 99-100.
Clean-up: Properly dispose of the specimen. Carefully clean the dissecting tray and instruments with
soap and warm water and then dry thoroughly with paper towels. Return all supplies to their proper
locations. Finally, wash your hands with soap and warm water.
                        Left coronary artery



                                           Great cardiac vein



Right coronary artery




 (region)

								
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