amniotic fluid
Blood
The mother sow provides all the nutrients needed by the fetus until birth. Directly into the blood stream.
What is the greenish substance in the stomach when disecting a fetal pig?
Simply because it is closer to the heart. Cardiac refers to the heart.
There is a very good reason there is no food found in a fetal pig's stomach. The fetal pig was never born.
The human stomach is bigger than the fetal pig's. This of course is if the human is an adult human.
Between the stomach and the small intestine
food
esophageal, cardiac, and pyloric
Rugae
Meconium
Controls passive from the esophagus into the stomach.