The thymus!
That would be the womb, also called the uterus (YOU tuhr-uss)
The fetus is expelled through the vagina during delivery.
The first organ to develop in the embryo is the heart. In a fetus, there is a brain, but it isn't fully developed and can't understand signals from the nervous system. Therefore the first functional organ would be the heart. But the first thing to start developing in a fetus is the nervous system. ( no that isn't an organ )
The uterus is a female reproductive organ where a fertilized egg implants and grows into a fetus during pregnancy. It is where the lining thickens and sheds during the menstrual cycle if pregnancy does not occur.
The structure that connects an embryo with the organ that nourishes it is called the umbilical cord. The umbilical cord attaches the developing fetus to the placenta, which is the organ responsible for providing nutrients and oxygen to the embryo or fetus while removing waste products. The umbilical cord contains blood vessels (two arteries and one vein) that carry deoxygenated blood and waste products away from the fetus and deliver oxygen and nutrients to the fetus from the placenta.
fetus
The organ where a fetus lives during gestation is called the uterus, specifically within the maternal body. The uterus provides a protective environment and necessary nutrients for the developing fetus through the placenta. This organ plays a crucial role in supporting fetal growth until birth.
The umbilical cord supplies the fetus' oxygen.
The implantation of the zygote occurs in the uterus. The developing fetus continues to grow and develop in the uterus until birth.
The organ where the developing fetus resides is called the uterus. This is where the fetus grows and matures inside the female.
Fetus
the placenta
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.
The organ that pushes the fetus out of the mother during childbirth is the uterus. During labor, the muscles of the uterus contract rhythmically to help expel the fetus through the birth canal. This process is commonly referred to as uterine contractions. The cervix also plays a critical role by dilating to allow the passage of the baby.
With mammals, the fetus has a connection by its umbilical cord to an organ of the mother, called the placenta. Blood passes through the umbilical cord to the fetus, carrying food and oxygen. The umbilical cord is attached to the fetus at a point you will later call your navel or belly button.
Placenta
Placenta