Question

aging has what effect on the skeletal system?
fusion of joints, especially in the vertebral column
loss of calcium and collagen fibers from matrix
increase in the number of cranial foramina
progressive loss of processes and tuberosities
increase in adipose tissue in epiphyses

Explanation:

As people age, the skeletal system undergoes changes. One of the main changes is the loss of calcium and collagen fibers from the bone matrix, which weakens the bones. Joint fusion in the vertebral column is not a universal aging - related change for all. The number of cranial foramina does not increase with aging. There is no progressive loss of processes and tuberosities as a typical aging effect on the skeletal system. An increase in adipose tissue in epiphyses is not a characteristic aging - related change of the skeletal system.

Answer:

loss of calcium and collagen fibers from matrix