In the fetal pig, the esophageal opening is located dorsal to the glottis. The esophagus lies to the top of the stomach, in close proximity to the diaphragm.
The esophagus leads into the stomach. And the trachea lead into the lungs.
The trachea has cartilaginous rings. The esophagus does not.
The major organs of a fetal pig's respiratory system are the esophagus, trachea, larynx, lungs and diaphragm. Non-organ components include the external nares, thymus gland and thyroid gland.
Trachea
the rostrum is the snout of a fetal pig
There are many characteristics found in a fetal pig. Fetal pigs generally have all of the characteristics of an adult pig.
The uterus keeps the trachea from collapsing in a fetal pig.
The trachea has cartilaginous rings. The esophagus does not.
The esophagus of a fetal pig, like many organs and body parts, looks very similar to that of a human. It is a long narrow tube, pinkish in color, with cilia lined in the inside (to help push down the food). Click on the link below for pictures of a fetal pig esophagus:
nothing
to support trachea
The major organs of a fetal pig's respiratory system are the esophagus, trachea, larynx, lungs and diaphragm. Non-organ components include the external nares, thymus gland and thyroid gland.
Trachea
Controls passive from the esophagus into the stomach.
The trachea, heart, lungs, bronchial tubes, thyroid gland, and the larynx are found in the cavity of a fetal pig.
The thoracic duct of a fetal pig is used to transport food into the stomach. This is present before the development of the esophagus.
It has the same function as it does in humans - to prevent food from going into the trachea.
The cartilaginous rings in a pigs trachea are incomplete. These rings are responsible for supporting the trachea of the pig when it breathes in and out. Without these rings the pig would be in danger of having their throat collapse.