Under the influence of the trophoblast, maternal blood vessels in the endometriu

Question

Under the influence of the trophoblast, maternal blood vessels in the endometrium A) disappear. B) attach to the inner cell mass. C) break down and form lacunae. D) form a capillary network in the trophoblast. E) increase in size and penetrate the blastocyst. A space opens within the inner cell mass that will form the A) blastocoel. B) lacunae. C) amniotic cavity. D) chorion. E) allantois. Attachment to and penetration of the endometrium by the blastocyst is referred to as A) cleavage. B) implantation. C) placentation D) embryogenesis. E) fertilization. The ectoderm forms A) muscle. B) blood. C) neural tissues. D) the lining of the stomach and small intestine. E) the urinary system. The mesoderm forms A) muscle. B) epidermis. C) the brain. D) the lining of the digestive tract. E) respiratory epithelium.

Explanation / Answer

1. Breaks down and form lacunae.

The endometrium is the uterus lining during pregnancy.it breaks down and forms lacunae during embryo development

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