e matrix of the compact bone. The density and strength of compact bones develops as a result of this. The osteons appear as the rings of tree and vary in appearance in different animals. This is reason why an examination of the physical composition of osteon remnants can help identify their age, gender or taxonomic category (type of species). Haversian canal maintains the source of blood and nerves that are located in the inner centre of the cortical bone tissue and is shielded by a very compact outer shell.
The cortical bone cells appear to be closely clustered together into a compact mass. This kind of bone tissue is not entirely solid even though they are close together. There are tiny canals running through the bone that allow blood vessels to get through it. Spongy bone, which resembles as sponge, contains large open spaces.
Compact Bone Vs Spongy Bone
There are very few spaces and gaps within the Compact bone tissue. Its porosity is very little. Cortical Bone tissue constitutes approximately 80% of this bone. It is due to its low porosity that it is also known as dense bone.
Cancellous or spongy tissues can be found in the interior position of the bone. This tissue comprises of an almost porous structural network that has shapes of plates and rods. Only 20% of bone mass is made up of Spongy tissues though their surface area is ten times greater than that of compact bone tissues.
Spongy bone tissues are surrounded by blood while compact bone tissues are bordered by marrow. Bone marrow appears as a yellowish fluid and can be found in the cavities within the compact bone tissues. It is in the spongy bone tissues where the red bone marrow can be found.
Cortical Bone tissues are strong and dense and may be found on the outer part of the bone. Spongy tissues are porous and may be found on the inner part of a bone. Blood is made on the spongy part of the bone.
Haversian system can be found in cortical bone tissues but is missing in spongy bone tissues.