Lymph

The lymph system is where bacteria gets filtered. This happens with the help of B-cells. B-cells live in the lymph inactivated. Each B-cell recognizes a different type of bacteria, no two are alike. When that bacteria is detected the B-cell that "matches" it the B-cell then undergoes mitosis producing more of that specific B-cell. The lymph node becomes swollen as the B-cells attack the bacteria coming to that node.

This could not happen if someone was not able to move or doesn't move much. That is because lymph does not flow it gets pushed by the movement of muscle. As it gets pushed it gets filtered and then goes to the heart. If someone did not move the bacteria would stay and they would become prone to infection.

Blood

Blood is different in people because of gender and age. Adult males have 6 liters of blood where adult women only have 5 liters. If women are pregnant though they have 6 liters due to the fetus blood. Adults red blood cells are hemoglobin proteins (2 alpha & 2 beta) which transport oxygen atoms (4). A fetus's red blood cells are also hemoglobin proteins but they do not have 2 alpha because they need to attract more O2 so it only has 2 beta.

Fetus blood is actually good for women who have sickle cell anemia. This is because fetus blood has more O2 which women who have sickle cell lack. The fetus and it's mother share blood so the mother there for gets the O2 that she needs.