The body parts that I know of are the quadriceps.
Quarterdeck is part of the ship's upper deck. It begins with the letter Q.
No chemical element begins with the letter Q.
it's called Quarters.
Xiphoid process is a body part.
Xiphoid process is a body part. It begins with the letter x.
quadriceps
There are no commonly recognized body parts that start with the letters Y or Q.
The muscle in the thigh is called a quadriceps. It is a body part.
Quadriceps are a body part.
Arm, ankle
the waist.
hypothalmus