More examples. The principal aim of this meeting is to reach a decision that we all agree on. The diaphragm is the principal muscle of respiration. I would like to earn more, but this isn't my principal reason for leaving the job. He can't give up teaching, it's his principal source of income.
Quadriceps femoris. The quadriceps femoris is a group of muscles located in the front of the thigh. The Latin translation of quadriceps is four headed, as the group contains four separate muscles: the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris.uadriceps femoris. The quadriceps femoris is a group of muscles located in the front of the thigh. The Latin translation of quadriceps is four headed, as the group contains four separate muscles: the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris.
The quadriceps as a whole has one main function, and that is to extend the lower leg. However, the rectus femoris also has another function, which is hip flexion. This is because this part of the quadriceps originates at the hip bone, unlike the other quadriceps muscles, which originate at the thigh bone.