Because the fetal lungs are inactive, the pulmonary circuit is bypassed. Half of the blood that enters the right atrium flows directly into the left atrium through the foramen ovale. The remainder flows from the right atrium to the right ventricle, then into the pulmonary trunk. The second bypass, the ductus arteriosus, transports the blood directly from the pulmonary artery into the aorta so it can be sent into systemic circulation.
The interatrial septum of the fetal heart is incomplete. The foramen ovale (literally, "oval door" connects the two atria and allows blood entering the right heart to bypass the pulmonary circuit and the nonfunctinal fetal lung.
The second bypass, is the ductus arteriosus, exist between the pulmonary trunk and the aorta.
At of shortly after birth, these shunts close, completing the separation between the right and left side of the heart.
In adults the foramen ovale is revealed by the fossa ovalis and the ligamentum arteriosum is the fibrous remnant of the ductus arteriosus.
Fetal pig diagrams can be found in most high school or "first" biology/zoologycollege, text books. There are many laboratory instruction manuals available also.
Between the stomach and the small intestine
The fetal pig is in amniotic fluid. There is no air in the womb and the lungs do not inflate until the pig is born.
A fetal pig is fed by its mother through an umbilical cord just like a human fetus.
The relative sizes of the external and internal jugular veins of a fetal pig and a fetal human are relatively the same size. This finding is similar in all mammals.
There are many characteristics found in a fetal pig. Fetal pigs generally have all of the characteristics of an adult pig.
hair found on fetal pig is very thin and light-colored. it is found all over the pig's body.
There is a very good reason there is no food found in a fetal pig's stomach. The fetal pig was never born.
Fetal pigs are not as developed as an adult.
The trachea, heart, lungs, bronchial tubes, thyroid gland, and the larynx are found in the cavity of a fetal pig.
Meconium
Fetal pig diagrams can be found in most high school or "first" biology/zoologycollege, text books. There are many laboratory instruction manuals available also.
the rostrum is the snout of a fetal pig
The epididymis in a fetal pig is responsible for producing sperm. It is located on one testicle in the fetal pig.
Controls passive from the esophagus into the stomach.
The ovaries of a fetal pig are located on each side of the pelvic cavity. Ovaries are only found on a female fetal pig.
The cranium of a pig serves to protect the brain from damage. However, in a fetal pig it has no purpose since a fetal pig is an unborn pig used for dissecting purposes.