All of the cells found in the blood come from bone marrow. They begin their life as stem cells, and they mature into three main types of cells— RBCs, WBCs, and platelets.
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The flexor digitorium profundus muscle inserts on the distal phalanges of digits II through V. The flexor carpi ulnaris muscle is one of the only anterior fore arm muscles innervated by the ulnar nerve, while the flexor pollicis longus muscle has its origin on the radius and the interosseous membrane and the flexor digitorium superficialis muscle inserts on the middle phalanges of the digits II through V.