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Sexual Reproduction

Horizontales
A hollow ball of cells produced during cell division of the embryo.
Cells that have developed tails.
The cells that separate maternal and fetal blood.
The production of egg cells in the ovaries.
Large nurse cells.
A small mass of narrow tubes where spermatogenesis occurs.
The sinking of the blastocyst into the endometrium, or uterus lining.
Verticales
The outer layer of cells where the process of sperm production begins.
Production of sperm.