The OvumGraafian follicleAzan _ 75

• FA = follicular antrum

• CR = corona radiata

• O2 = secondary oocyte

• ZG = zona granulosa

• TI = theca interna

• The oocyte is released along with the corona radiata.

• Notice the clear ring just around the ovum (arrow tip): this is the zona pellucida.

From Wheaterís Functional Histology, 4th ed., 2000.

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