The aging process affects all body systems. If we review both the cardiovascular and respiratory systems, we see in both cases, there is a general decline in.

flexibility and elasticity?
or
the rejuvenation of new cells?

flexibility and elasticity

Explanation: Blood vessels lose their elasticity as we get older.

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.