Which body system(s) contribute significantly to red blood cell production?i. reproductiveii. skeletaliii. integumentaryiv. nervousv. urinary

The body system that contributes significantly to red blood cell production is the skeletal system. This is because red blood cells are produced in the bone marrow, which is a spongy tissue found in the hollow parts of some bones. The bone marrow contains stem cells that can become red blood cells, white blood cells, or platelets.

The other systems listed (reproductive, integumentary, nervous, and urinary) do not directly contribute to the production of red blood cells. However, they may play indirect roles. For example, the nervous system regulates the rate of red blood cell production by releasing erythropoietin in response to low oxygen levels in the body. The urinary system also plays a role in this regulation, as the kidneys are the primary organs that sense low oxygen levels and signal for increased erythropoietin production.

So, in summary, the skeletal system is the primary contributor to red blood cell production, with indirect contributions from the nervous and urinary systems.