An endowment is a fund that is restricted. Only the interest from the fund can be spent, not the principal that anchors the endowment. Usually, only a portion of the interest or earnings from the endowment (typically five percent) can be spent annually to make sure that the original funds grow over time.
Hearing. The external ear, also called the auricle or pinna, is the loop of cartilage and skin that is attached to outside of the head. It works much like a megaphone. Sound is funneled through the external ear and piped into the external auditory canal, according to Nebraska Medicine.
Objectives: The external ear is the entry way to the auditory receptors of the inner ear. Thus, it plays an important role in normal hearing. Because it is a structure that is frequently examined in the clinic, understanding of its functions is important.At the end of this section you should be able to: 1. Describe the two functions of the external ear, including the effects of the pinnae and ear canals on incoming sound waves.ecause it is a structure that is frequently examined in the clinic, understanding of its functions is important. At the end of this section you should be able to: 1. Describe the two functions of the external ear, including the effects of the pinnae and ear canals on incoming sound waves.