Oogonia arise from the endoderm of the . . . . . . .

After ovulation,the Graafian follicle transforms into:

Sperms are released from the seminiferous tubules by the process called .....

Draw a labeled diagram of a Graafian follicle.

Match the part of the sperm in Column $I$ with its component in Column $II$ and its function in Column $III$, and select the correct option.

Column $I$ (Part of sperm)	Column $II$ (Component) and Column $III$ (Function)
$A$. Head	$Q$. Acrosome - $Z$. Secretes penetrating enzyme
$B$. Neck	$P$. Centrioles - $X$. Helps in formation of synkaryon spindle
$C$. Middle piece	$R$. Nebenkern - $Y$. Provides energy for sperm movement
$D$. Tail	$S$. Axial filament - $W$. Whiplash movement in female reproductive tract

$FSH$ hormone acts on the Sertoli cells and stimulates the secretion of some factors which help in the process of spermiogenesis.