Question

In animals,embryo gets nutrition through

Answer 1

Answer:

In lower animals the embryo is nourished by the yolk. ... Nutrients pass from the placenta through the umbilical cord, and the amnion, a fluid-filled membrane, surrounds and protects the embryo. The division of the body into head and trunk becomes apparent, and the brain, spinal cord, and internal organs begin to develop.

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Answer 2

In these animals, embryo receives nutrients from the mother through a special structure called placenta and remains enclosed in the womb (uterus) until birth. ... In contrast, eggs of oviparous and ovoviviparous animals contain yolk which is utilized by the developing embryo. The yolk contains all the required nutrients.

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