DefinitionsThe movement of ocean water is one of the twoprincipal sources of discrepancy between dead reckonedand actual positions of vessels. Water in motion is called acurrent; the direction toward which it moves is called set,and its speed is called drift.
Human RBC precursors are obtained by (i) separating glycophorin A(+) (gly A(+)) cells using a magnetic cell sorting (MACS) technique and by (ii) ex vivo expansion of precursors BFU-E (burst forming unit-erythroid) on methylcellulose semi-solid culture media from mononuclear cells of cord blood.
RBCâs: containers for Hgb, lack nucleus and mitochondria ; Hgb: protein ideally suited for O 2 transport ; RBC membrane: provides strength and flexibility ; RBC metabolism: provides energy and protects RBC/Hgb from environmental insults; Erythroid marrow. Production of RBCs: (1) Fetal Life â Liver, Spleen, Bone Marrow (BM) (2) Child/Adult â BM.