Where are red blood cells produced

Production of red blood cells is controlled by erythropoietin, a hormone produced primarily by the kidneys. Red blood cells start as immature cells in the bone marrow and after approximately seven days of maturation are released into the bloodstream.

Explanation:

frances ellen watkins harper writing was influenced by: b. the education she received growing up in the north.

she was born in baltimore, maryland, on september 24, 1825. after the death of her parents, her uncle reverend william watkins, a teacher at the academy for negro youth, raised and educated her. she also continued educating herself by accessing a library of the family she worked for, beginning writing poetry afterwards. as a civil rights activist and abolitionist, watkins greatly influenced her life and work.

answer:

explanation:

c