A thrombus has formed in his vena cava.

The umbilical vein plays a crucial role in transporting nutrients and oxygen to the fetus.

The baby's umbilical vein plays a crucial role in transporting nutrients from the mother.

My father underwent surgery for varicose veins.

My grandmother needs home nursing.

He is a very dedicated male nurse.

The nurse treated my wound.

He is my favorite teacher.

He is my music teacher.

Mr. Shi is my neighbor.