Protein digestion takes place between your mouth and your small intestine. All the cells of your body contain protein, and this protein is continually broken down and remodeled to meet your growth and maintenance needs.
If you need help, here is a hintâ¦ Each year, there are over 100,000 heart valve surgeries performed in the United States. For the answer, scroll down below the picture of a diseased mitral valve with calcified valve flaps.
1 So you could say that on average, human beings replace all their fat cells about every ten years. 2  Cardiomyocyte heart cells are replaced at a reducing rate as we age. 3  At age 25, about 1% of cells are replaced every year.