it is the amneotic fluid.
embryotic sac
It allows (forms) a (semi)closed environment for the development of the fetus.
The amniotic sac is the sac in which the fetus develops in amniotes. Its wall is the amnion, the inner of the two fetal membranes. It encloses the amniotic cavity and the embryo.
In the Uterus.
The Testis is suspended by the spermatic cord which consist of the vas deferens and the testicular vessels enclosed with fascia and cremastric muscles
Vesicles are membrane sacs (or pouches) that transport proteins
It appears after 22 days of pregnancy. It comes from primary yolk sac. Primary yolk sac gets enclosed inside from folding of the fetus, the rest is secondary yolk sac, which goes down to mesoderm and shrinks.
the fetus is in the yolk sac
No, a sac grows to accommodate the fetus and if the fetus us dead it does not grow anymore.
The protective sac around the embryo or fetus is the amniotic sac.
Amniotic sac and fluid has a protective functions for the fetus. This sac separates the fetus from the mothers tissue.
sac in which the fetus develops in amniotes
The Amniotic Sac is the sac that contains the baby.
the womb or amniotic sac
placenta
fetus
amniotic sac
Amniotic sac