Can you be more anatomically specific
as to what you mean by 'blood layer'?
The layer of muscle found below the skin where blood readily flows.
Vipers have fangs large enough to puncture through the dermis,
the lymphatic and into muscle.
Blood also readily flows through dermis capillaries and arterioles & venules
of the
cutaneous vascular plexus, so why would you not count that in your
termed 'blood layer'?
At rest, BFR in skin and muscle is in the range
of 1-3 ml/100g/min. and 1-4 ml/100g/min.
respectively.
