Answer:
15 -phasia means a speech disorder(a)
16 hard(b)
An artificial heart is made from machine. Artificial heart is also known as a mechanical circulatory support, its function depends on what chambers of the heart it replaces. Artificial heart needs battery for it to work.
A normal heart is made up of muscle tissue, specifically the cardiac muscles. A normal heart only needs the cells of the body that produces energy.
The three degree programmes offered after bachelors are Masters degree, MPhil. and PhD.