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Spider-shaped mature bone cells, called OSTEOCYTES, live in small spaces in the lamellae called LACUNAE. Tiny canals, called CANALICULI, connect the lacunae to each other and to the Haversian canal. The canaliculi contain slender, tentacle-like cellular processes of the osteocytes. The canaliculi provide routes through which nutrients and oxygen from the blood can reach the osteocytes and waste products (ammonia, carbon dioxide) can be removed and eventually carried away by blood vessels in theHaversian canals.
a rock that is full of tiny, connected air spaces is PERMEABLE
matrix
Permeability
Synaptic gap
no
Alveoli
They are called capillaries.
I believe the tiny blood vessels are called capillaries, located in the lungs.
The tiny structures are called centrioles
The tiny structures are called centrioles
vesicular