The umbilical cord supplies the fetus' oxygen.
The Placenta
placenta
The organ where the developing fetus resides is called the uterus. This is where the fetus grows and matures inside the female.
The lungs are the major organ in the respiratory system, which also includes the nerves, airways and blood vessels that serve them.
Fetus
Any animal that breathes has a respiratory organ
the placenta
Compared to what? It is the only respiratory organ in humans.
the primary respiratory organ for cockroach is trachea
the type of respiratory organ mollusks have is GILLS.
The heart is the first organ to develop in a fetus. Together, blood and the circulatory system, that is powered by the heart, form the first organ system.
Placenta