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

精子产生于输精管壁的母细胞（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.

集于小静脉壁的中粒细胞（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.

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（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（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.

子产于输的性母细胞（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.

图示边集于小静脉的中性粒细胞（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.

子产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（所示）正出基（出），游走到血管外。