CHANGES WITH AGING - BLOOD SUPPLY
Changes In Bone Marrow With Age
Cell restorative capacity affects the number, size,
and haemoglobin concentration. This remains largely
unchanged throughout life. The amount of active bone
marrow diminishes and marrow fat increases.
Changes In Red Blood Cells With Age
The average life span of red blood cells remains constant
at about 120 days, although these cells may be more
fragile. The blood volume is also usually well maintained
throughout old age.
Changes In White Blood Cells With Age
The number of white blood cells and platelets remain
unchanged, and the white blood cells continue to be
effective in fighting off bacteria. Anaemia in older
people is not caused by age. It is most frequently due
to malnutrition, blood loss, or a malignancy.
NEXT: Immune System
|
