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Anatomía Animal
Inst. Suheidy Valentín
Biol 3052L
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.
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 byproducts of the meat industry that have been preserved for
use in the science classroom.
• .
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)
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
•
The two arteries and one vein (upper left) of the umbilical cord are surrounded by a large
amount of connective tissue.
• Apendices: Examinar las patas
Encontrar:
• hombro, codo, muñeca, y los digitos.
• cadera, rodilla
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
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.
Incisiones para abrir la
cavidad bucal
Glotis
Epiglotis
Paladar
suave
Paladar
duro
Apertura
nasofaringeal
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
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
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
Hígado
•
Here, the liver has been removed from
the abdominal cavity. The anterior
two lobes are easily visible in the
photo
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.
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.
The mesentery attaches
the intestines to the
abdominal wall and
helps them maintain
their convoluted shape.
Corazón y Sist. Circulatorio
• The pig
heart is
located in
the center
of the
thoracic
cavity.
• 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.
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.
Vena
cava
Aorta
Arteria
pulmonar
when removed this organ is bean or
peanut shaped. It is responsible for
filtering the pig's blood.
•