The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母（精原）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中性粒（头所示）正基底膜（），走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母细胞（精原细胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中性粒细胞（箭头所示）正出基底膜（渗出），游走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母细胞（精原细胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图边集于小静脉壁的中性粒细胞（箭所）正出（渗出），游走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母（精原）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中性粒（头所示）正基底膜（），走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精性母细胞（精原细胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉中性粒细胞（箭头所示）正出基底膜（渗出），游走到血外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的母胞（精原胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中胞（箭头所示）正出基底膜（渗出），血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生输精管壁的性母细胞（精原细胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边静脉壁的中性粒细胞（箭头所示）正出基底膜（渗出），游走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

子产生于输管壁的性母胞（胞）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中性粒胞（箭头所示）正出基底膜（渗出），游走到血管外。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母细（精原细）。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图示边集于小静脉壁的中性粒细（所示）正基底（），游走到血管外。