Martian blood vessel remains are shown like coils or internets in Fig.
1 below.
They closely resemble the floating blood vessel remains on a specimen
of a Carboniferous human calvarium fossil owned by Mr. Ed Conrad of
Pennsylvania
(Fig. 2)
NASA should grind them (fibrous coils in icy soil of Snow White) and
bake them in the ovens. Otherwise, tests by the atomic-force
microscope will show drastically different results than those obtained
from the oven tests. The reslut from the first oven test is a warning
against disregarding these Martian fibrous vessels.

Fig. 1: Martian blood vessel remains shown as twinkling internets
http://www.flickr.com/photos/hortonheardawho/2680821809/sizes/o/

Fig. 2: Coiling blood vessels remains on an Earthly Carboniferous
human calvarium fossil
         http://www.wretch.cc/album/show.php?i=lin440315&b=19&f=1328514925&p=32