What is the pericardium fetal pig dissection?
The pericardium is a membrane that surrounds the heart and lines the pericardial cavity. It contains a lubricating fluid and isolates the heart from body movements such as the expansion and contraction of the nearby pleural (lung) cavity.
How do you tie a fetal pig for dissection?
Place the fetal pig on a dissecting tray ventral (belly) side up. Use two or three rubber bands to tie the right hind leg around the ankle. Run the rubber bands around the underside of the tray and tie the left hind leg. Repeat for the forelegs.
What organ is attached to the umbilical cord in a fetal pig?
Most of the pig’s external features are familiar to you – ears, nose, eyes, etc. On the belly you will see the umbilical cord which connected the fetal pig to its mother’s placenta.
Why is the fetal pig a good specimen to dissect?
A fetal pig dissection is helpful for anatomy studies because the size of the organs makes them easy to find and identify. It is also interesting to do because a lot of the internal anatomy is similar to humans!
What is the ductus arteriosus in pigs?
Ductus arteriosus — This short vessel in the fetal pig passes from the pulmonary artery to the aortic arch. Before birth it is used as a shunt to bypass the lungs, which are collapsed. In adults it becomes a small ligament.
What is the function of the ductus arteriosus in unborn mammals?
The ductus arteriosus sends the oxygen poor blood to the organs in the lower half of the fetal body. This also allows for the oxygen poor blood to leave the fetus through the umbilical arteries and get back to the placenta to pick up oxygen.
What is the difference between the atria and ventricles in a fetal pig?
The right side of the heart pumps blood to the lungs (pulmonary circulation), and the left side pumps blood out to the rest of the body (systemic circulation). Each side of the heart has two chambers, the upper chambers are called atria and the lower chambers are called the ventricles.
Why do the lungs appear collapsed in the fetus?
Lungs appear collapsed in the fetus because they are filled with amniotic fluid and they have never been inflated with air yet.
How does the internal anatomy of a fetal pig differ from a human?
Internal Organs Pigs have all of the same thoracic and abdominal organs as humans. There are small differences in a few organs. Liver – the human liver has four lobes: right, left, caudate and quadrate. The fetal pig liver has five lobes: right lateral, right central, left central, left lateral, and caudate.
Where is the foramen ovale in fetal pig?
Second, in the fetal heart, there is an opening between the right atrium and the left atrium. This opening is called the foramen ovale.
What does the ductus arteriosus do in fetal pigs?
Ductus arteriosus — This short vessel in the fetal pig passes from the pulmonary artery to the aortic arch. Before birth it is used as a shunt to bypass the lungs, which are collapsed.
Why is the ductus arteriosus important?
The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. However, when the baby is born, the blood must receive oxygen in the lungs and this hole is supposed to close. If the ductus arteriosus is still open (or patent) the blood may skip this necessary step of circulation.
What does the ductus arteriosus do?
While a baby develops in the womb, an opening between the aorta and pulmonary artery (the ductus arteriosus) allows blood to bypass the baby’s lungs and go straight to the body. Blood does not need to go to the lungs first, because the mother supplies the baby with oxygenated blood through the placenta.
What does hog tying look like?
It involves putting a person on his stomach and tying his cuffed hands to his bound feet behind his back with an adjustable nylon belt, a device known as a “hobble.” Police officers have said the hogtie position is used to restrain individuals who can’t be restrained any other way and would otherwise pose a danger to …
Why are the two atria kept separate from one another and the two ventricles kept separate from one another in the mammalian?
The ventricles are separated by the interventricular septum. The atria are also separate from one another, so that the de-oxygenated blood of the right chambers is kept separate from the oxygenated blood of the left chambers. In the mammalian fetus, the left and right ventricular walls are about equal in thickness.