Across

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$1.$ Another name for the blastodisc.

$4.$ The medulla oblongata of the chick forms from this brain region.

$8.$ The cerebral aqueduct of the developing chick is associated with this brain region.

$10.$ A disc of yolk$-$free cytoplasm at the anmal pole of chicken eggs.

$11.$ The region of the chick embryo where neuraltion begins.

$13.$ Blood islands come from this type of tissue.

$14.$ The amnion is derived from this type of tissue.

$17.$ This thin extraembryonic membrane is the outermost extraembryonic membrane in the developing chick.

$18.$ This extraembryonic membrane acts as a reservoir for urea and uric acid in the developing chick.

$20.$ Paired blocks of mesoderm that flank the notochord.

$24.$ The avian "organizer".

$26.$ The surface layer of the area pellucida..

$27.$ Another name for the multicellular avian blastodisc.

$29.$ The enzymes required by chicken sperm to penetrate the inner perivitelline layer come from this region of the sperm.

$30.$ The junction between the area pellucida and the area opaca of the chicken embryo.

$31.$ The space between the epiblast and the hypoblast of the developing chick embryo.

$33.$ A chicken egg acquires its shell here:

$34.$ The migration of individual cells into the interior of an embryo.

$35.$ Chicken eggs are this type of egg.

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Down

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$2.$ Cleavage in the chicken embryo begins here:

$3.$ The cerebellum of the chick forms from this brain region.

$5.$ The cerebral hemispheres of the chick form from this brain region.

$6.$ The pineal gland of the chick forms from this brain region.

$7.$ The first extraembryonic membrane to appear in the developing chick.

$9.$ This organ is derived from the second pharyngeal pouch of the chick.

$12.$ This extraembryonic membrane helps to keep the chick embryo moist.

$14.$ Feathers are derived from this type of tissue.

$15.$ Avian cleavage is:

$16.$ The allantois is derived from this type of tissue.

$19.$ This organ is derived from the second pharyngeal pouch of the chick.

$21.$ This structure becomes the vertebral column.

$22.$ These structures maintain the upright position of the blastodisc during chicken development.

$23.$ Fertilization of the chicken oocyte occurs in the:

$25.$ Avian cleavage is:

$28.$ This cavity becomes part of the fourth brain ventricle.

$29.$ The protein that makes up egg whites.

$32.$ In the chicken, only this ovary and oviduct are functional.

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Complete the puzzle please write in the image I attached