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Reproductive System (Male reproductive structures (Seminiferous tubules…

- - - - Consists of primary oocyte surrounded by by flattened follicle cells; 1.5 million present at birth; arrested in first meiotic prophase
    - - Consists of a primary oocyte surrounded by one or more layers of cuboidal follicular cels (granulose cells); secretes estrogen as it matures
    - - Forms from primary follicle; contains primary oocyte, many layers of granulose cells, & fluid-filled space called antrum; has two protective structures: zona pellucida & zona radiata
    - - Mature follicle forms from a secondary follicle; contains secondary oocyte, numerous layers of granulose cells, antrum; has completed meiosis 1, and is arrested in metaphase 2
    - - The remnants of follicle after mature follicle ruptures and oocyte is expelled; secretes progesterone and estrogen that prepare uterus for possible implantation
    - - Whitish connective tissue scar, remnant of a degenerated corpus luteum