Aging effects all of the body's cells, tissues, and organs which in turn affect the functioning of all body systems. as cells age, cell change, so body tissues have more trouble getting oxygen and nutrients and removing carbon dioxide and wastes.

membranes

Explanation:

Aging is understood to mean the physiological changes that occur over time in multicellular organisms. To further detail, such changes occur in molecules and cells that ultimately impair the functioning of organs and the body in general. The causes of such a period can be divided by considering the genetics, lifestyle and environment in which a person lives. Aging physiologically affects all cells and all systems in the body. As cells get older, membrane cells change, so body tissues have more trouble getting oxygen and nutrients and removing carbon dioxide and waste.

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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