1 Anatomía Animal Inst. Suheidy Valentín Biol 3052L

2 Introducción al feto del cerdo Los fetos o los cerdos sin nacer se obtienen de cerdas preñadas y que las van a matar para comida. El tamaño del feto dependerá del estado de gestación. Se embalsaman en formaldehido de una solución a base de fenol, los cerdos se guardan en un preservativo que usualmente no contiene formaldehido pero retiene el olor. Se tiene que usar guantes para trabajar con el feto.

3 Fetal pigs are often used in Anatomy and Physiology classes because of the similarities between organ appearance and relative position to that of a human. These pigs are by- products of the meat industry that have been preserved for use in the science classroom.

4 . Identificar las regiones del cuerpo: cabeza (cranial) region cuello (cervical) region region de tronco (thoracic region) cola (caudal) region (abdomoninal region) 4. Cabeza: Encontrar: pinna (auricle):oído externo huecos nasales Parpados superiores y el bajo nictitating membrane (tercer parpado)

5 . Tronco- se divide en tórax anterior encasillado por las costillas y un abdomen posterior cordon umbilical- superficie ventral del abdomen. Vasos sanguíneos pasan de la placenta, enlazados a la pared del utero de la madre al feto del cerdo atravez del cordon Cortar un poco (0.5 cm) del cordon para ver : Arterias umbilicales: 2 arterias, llevansangre deoxigenada del feto a la placenta Vena umbilical : una sola vena grande, lleva sangre oxigenada de la placenta al feto

6 The two arteries and one vein (upper left) of the umbilical cord are surrounded by a large amount of connective tissue.

7 Apendices: Examinar las patas Encontrar: hombro, codo, muñeca, y los digitos. cadera, rodilla

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9 The illustration shows where the incisions are made in the fetal pig to order to view the internal organs properly. Remember: be very careful in your cuts, you don't want to destroy any interesting organs underneath the skin

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11 This is the second cut made to open the fetal pig. The third cut(s) are made from the posterior end of the first cut and down along either side of the umbilical cord.

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14 Incisiones para abrir la cavidad bucal

15 Glotis Epiglotis

16 Paladar duro Apertura nasofaringeal Paladar suave

17 Sist. Respiratorio Remover los músculos en la region del cuello, para exponer la glándula del timo en cada lado del cuello -esta glandula es grande en el feto y en mamiferos jovenes con la edad disminuye, juega un papel importante el sist. inmuno. del cuerpo

18 The Trachea The trachea is also called the windpipe. These structures can be hard to see in a fetal pig, but are fairly easy to feel. If you use your scalpel to open the pig throat, you will feel a harder, ringed structure. Put the scaplel down and feel it with you fingers. This is the trachea

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20 Sist. Digestivo La Cavidad Abdominal Next, the dissection moves into the abdominal cavity. In this photo, the spleen is being pushed up for best viewing. Superior to the spleen is the liver, one of the largest organs in the abdominal cavity, and under the lower, right edge of the liver, you can see the curve of the stomach

21 Hígado Here, the liver has been removed from the abdominal cavity. The anterior two lobes are easily visible in the photo

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23 The Intestines The small intestine The small intestine has been removed as a bunch. You can see the convolutions of this part of the digestive tract.

24 The Intestines (continued) The Large Intestine and Mesentery The large intestine is shorter than the small intestine, but it is two to three times larger in circumference.

25 The mesentery attaches the intestines to the abdominal wall and helps them maintain their convoluted shape.

26 Corazón y Sist. Circulatorio The pig heart is located in the center of the thoracic cavity.

27 This heart has been removed from the thoracic cavity of the pig. It is still wrapped in the pericardium, a fibrous layer of connective tissue that surrounds and protects the heart.

28 Now, the pericardium has been removed. It is very easy to see the auricles covering the left and right atria of the heart. You can also see the outer portion of the atrium ventricular septum which separates the left and right sides of the heart.

29 Aorta Arteria pulmonar Vena cava

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33 when removed this organ is bean or peanut shaped. It is responsible for filtering the pig's blood.

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