The lungs are spongy because of the millions of alveoli or air sacs found it them. These alveoli expand when air is inhaled so when it is in a state that contains no air, little spaces are formed making them feel spongy.
Trachea
The pigs lungs are located in the chest cavity. They are on both sides of the body and they feel spongy.
They Have Four Lobes
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.
A fetal pig's lungs are collapsed because they are filled with fluid while in the uterus. This allows for easier passage through the birth canal and prevents the lungs from being damaged during development. Once the pig is born and takes its first breath, the lungs expand and fill with air.
I just did this dissection on Friday. They're more smooth and firm. I'm 99% sure that this is because a fetus' lungs wouldn't have to expand and contract yet so it wouldn't take on that flexible, spongy texture. That's the answer I'm putting on my lab report anyway!
When the lungs do not function the backup respiratory system takes over the function of the lungs. This is true in a fetal pig.
smoothe
rib cage
Trachea
A fetal pig's lungs are similar to an adult's in the interior. The difference is that it is much smaller.
They Have Four Lobes
The pigs lungs are located in the chest cavity. They are on both sides of the body and they feel spongy.
Fetal lungs are not functioning; no organism can start to breathe while immersed in amniotic fluid. Lungs only begin to function at birth.
The pleura cover and protect the lungs in a fetal pig.
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 trachea, heart, lungs, bronchial tubes, thyroid gland, and the larynx are found in the cavity of a fetal pig.