Trace one (1) possible path of a red blood cell traveling from the right thumb to the right atrium (RA)
RBC is a component of blood,which flows inside vessels (arterirs and veins).Veins carry blood from peripheral tissues or organs towards heart(rt atrium) and artery carries blood form heart(lt ventricle )towards tissues.
Thus here rbcs frm rt thumb to rt atrium via venous system of upper limb:Starting from( 2dorsal digital veins of thumb__cephalic vein __median cubital vein__basilic vein__axillary vein__subclavian vein__rt brachiocephalic vein__superior vena cava__rt atrium.)
This is one possible way there are other veis like deep vens ,perforting veis also many interconnecting channels present in between veins which together with those superficial veis form venous system of upper limb.
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