- cord.
While the
function of the
allantois remains conserved,
there is a
divergence in the
characteristics of the
allantois among mammalian species. Structural...
-
connected to the yolk sac, the
allantois, and via the
umbilical cord, the placenta. The yolk sac, amnion, chorion, and
allantois are the four extraembryonic...
-
increased need for oxygen. To
compensate for this, the
chorion and the
allantois fuse
together to form the
chorioallantoic membrane.
Together these form...
- and
fetus in
humans and
other mammals. They are the amnion, chorion,
allantois, and yolk sac. The
amnion and the
chorion are the
chorioamniotic membranes...
-
illustrating early formation of
allantois and
differentiation of body-stalk. 1
Amniotic cavity 2 Body-stalk 3
Allantois 4 Yolk-sac 5
Chorion Diagram showing...
- the
allantois, and
thence upon the
umbilical cord; the
other is the
smooth outer layer,
continued upon the
outer or
chorional surface of the
allantois, and...
-
membranes (amnion for
embryonic protection,
chorion for gas exchange, and
allantois for
metabolic waste disposal or storage),
thicker and
keratinized skin...
- is at
first prolonged backward into the body-stalk as the tube of the
allantois; but, with the
growth and
flexure of the tail-end of the embryo, the body-stalk...
- the
crystals previously isolated] are
allantois acid, or the same
substance that one
found in the
allantois fluid of cows; we will call it "allantoin"...
-
surrounds the yolk, the
amnion which surrounds and
cushions the embryo, the
allantois which among avians stores embryonic waste and ****ists with the exchange...
