Compact bone consists
of closely packed osteons or haversian systems
. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
What is the histology of bone?
Like cartilage, and other types of connective tissue, bone is
made up of Cells and Extracellular matrix
: Cells – which in bone are called osteoblasts and osteocytes, (osteo – bone). … Before the extracellular matrix is calcified, the tissue is called osteoid (bone-like) tissue.
What is the histology of compact and spongy bone?
Compact bone tissue is composed of osteons and forms the external layer of all bones
. Spongy bone tissue is composed of trabeculae and forms the inner part of all bones.
What is the name of the basic histological unit of compact bone?
The diagram above shows a transverse view of
an osteon (Haversian system)
– the basic unit of compact bone. The diagram above shows a longitudinal view of an osteon. Some, mostly older, compact bone is remodelled to form these Haversian systems (or osteons).
What is in the bone matrix histology?
Bones and Teeth, Histology of
Bone matrix (also known as osteoid) consists of
about 33% organic matter (mostly Type I collagen) and 67% inorganic matter (calcium phosphate, mostly hydroxyapatite crystals)
.
What is an example of compact bone?
Compact bone forms a
shell around cancellous bone
and is the primary component of the long bones of the arm and leg and other bones, where its greater strength and rigidity are needed.
Why do we need both compact and spongy bone?
They are the bone tissues in animals that provide shape and support to the body. Both types of bones contain osteoblasts and osteoclasts that are necessary for creating bones. Both compact and spongy bones contain
proteins like collagens and osteoids
, which mineralize to help in bone formation.
What are the 2 types of bone?
There are two types of bone tissue:
compact and spongy
. The names imply that the two types differ in density, or how tightly the tissue is packed together. There are three types of cells that contribute to bone homeostasis.
What is the importance of histology?
D. Histology is
the study of how tissues are structured and how they work
. Knowing what a normal tissue looks like and how it normally works is important for recognizing different diseases. It also helps in figuring out what causes certain diseases, how to treat those diseases, and whether the treatment has worked.
Which is the weakest cartilage?
Fibrous cartilage
is the weakest of the three types of cartilage. It has the fewest cells, so it has numerous fibres and the most intercellular space. Fibrous cartilage is softer than hyaline cartilage, but it has thicker collagen fibres.
Which type of bone is very hard and strong?
Compact bone
is the solid, hard outside part of the bone. It looks like ivory and is extremely strong. Holes and channels run through it, carrying blood vessels and nerves. Cancellous (pronounced: KAN-suh-lus) bone, which looks like a sponge, is inside compact bone.
What are bone cavities called?
Anatomical terminology
The
medullary cavity
(medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored; hence, the medullary cavity is also known as the marrow cavity.
What are the characteristics of compact bone?
Compact bone has
a sturdy calcified matrix with very few spaces
. This layer not only forms a protective shell around the spongy bone tissue, but it also gives our bones their rigidity, strength, and resistance.
Where is bone matrix located?
The bone matrix is
that part of the bone tissue and forms most of the mass of the bone
. It is comprised of organic and inorganic substances.
What material is the bone matrix rich in?
The bone matrix is rich in
calcium and phosphorus
. Bone Matrix consists of substances such as inorganic bone salts and collagen fibers. Bone matrix is a protein matrix that contains minerals like calcium and phosphorus which get deposited and form bones.
What is the function of the bone matrix?
Bone matrix constitutes a complex and organized framework that
provides mechanical support and exerts essential role in the bone homeostasis
. The bone matrix can release several molecules that interfere in the bone cells activity and, consequently, has a participation in the bone remodeling [117].
