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（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。

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.

图于小静脉壁的中性粒细胞（箭头所）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.

生于输管壁的性母细胞（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中粒细胞（箭头所示）正出基底膜（渗出），游走到血管外。