The quadriceps muscles.
The body parts that I know of are the quadriceps.
Some body parts starting with N are nose, neck, navel, and nails.
Quadriceps femoris muscle
Quadriceps, quadratus lumborum, quadratus femoris are body parts that start with Q.
ribs
triceps
Veins and vagina are body parts. Vocal cords are part of the body.
Scalp, septum, shinbone, shoulder, skull, spine and stomach are body parts starting with s. Abdomen, ankle, anus, appendix, arm and artery are body parts that begin with the letter a.
quadriceps- they are the muscles on your upper leg
Hind quarter, the rear end.
Neck