orifice

"The boy received a deep wound on his knee during a soccer game. "

"My brother plays the flute and also practices the pipe. "

"The doctor checked the patient's artery to see how quickly blood was flowing. "

"The doctor examined the patient's vagina to check for any issues. "

"Turn the doorknob to open the door."

"the orifice of an artery or vein;   the orifice of a wound;   the vagina and other orifices"

"My brother is a different person; he's an other, not like me at all. "

"The baby opened its mouth to receive the milk from its mother. "

"an aperture in a wall"

"The toothpaste came in a bright red plastic tube. "

"My sister's new job offers a similar salary; it's a good such for someone with her experience. "

"The doctor examined the patient's arm, looking closely at the visible veins. "