Anatomy of bony tissue

1. Dr. Aamir Shaheen
DPT(AIMC), M.Phil.
Lecturer, Quaid-e-Azam Educational Complex, Sahiwal

2. “The branch of anatomy in which bones
and cartilages are discussed is called
as osteology.”

4. Bone is a
 Rigid,
 Highly vascular,
 Dynamic
 Constantly changing
 Mineralized
 Specialized form of
 Supporting Connective tissue.

6. Bones can be classified in a number ways,
some modes of classification of bones are as
follows,
1. Developmental Classification
2. Structural or Architectural Classification
3. Regional Classification
4. Size and Shape based Classification
5. Miscellaneous Classification

7. Ways of Classification
of Bones
Developmental
Classification
Structural or
Architectural
Classification
Regional
Classification
Size and Shape
Based
Classification
Miscellaneous
Classification

8.  On the basis of mode of development of
bones, bones are classified into three sub-
categories,
1. Intramembranous Bones
2. Intracartilagenous Bones
3. Membrano cartilagenous Bones

9.  According to this mode, two types of bones
are there
1. Compact Bone or Haversian Bone
2. Spongy Bone or Cancellous Bone

11.  On the basis of region wise classification, two
categories are there
1. Axial Bones
2. Appendicular Bones

14.  Following sub-varities are found on the basis
of size and shapes of bones of human body,
1. Long Bones
2. Short Bones
3. Long-Short Bones
4. Flat Bones
5. Irregular Bones

19.  Following miscellaneous varities of bones
classes are there
1. Sesamoid Bones
2. Supernumery Bones
3. Accessory Bones
4. Pneumatic Bones

22. Ways of
Classification of
Bones
Developmental
Classification Structural or
Architectural
Classification
Regional
Classification
Size and Shape
Based
Classification
Miscellaneous
Classification

23.  On the basis of this mode, two types of bones are there
◦ Compact Bone
◦ Spongy Bone
 Compact Bone:
◦ It is such bone having following characteristics,
 Well developed Haversian System or Osteon
 Each Osteon will be made up of lamellae arranged around a
longitudinal
Canal called Haversian Canal carrying blood vessels.
 Each Lamellae is layer of extracellular matrix containing fibers
,ground substance and minerals.

25.  Hard Bone present inside the periosteum and
surrounding the softer bone inside is called as compact
bone
 It is such bone having following characteristics,
1. Well developed Haversian System or Osteon
2. Each Osteon will be made up of lamellae arranged around
a longitudinal
3. Canal called Haversian Canal carrying blood vessels.
4. Each Lamellae is layer of extracellular matrix containing
fibers
5. ,ground substance and minerals.
6. Bone cells are scattered between lamellae giving aunts
shaped appearance.

29.  Shaft Of Long Bones
 Flat bones of skull has inner and outer layers
of compact bone.
 In short bones, core of spongy bone is
surrounded by layer of compact bone.

31.  It is also called as cancellous bone or
trabeculae bone.
 It is present inside the compact bone and
surrounded from outside by endosteum.
 It is such bone in which bone substance is in
the form of trabeculae.
 Lamellae are arranged flat.
 No Typical Haversian system is seen here.

35.  Ends of long bone are made up of spongy
bone with a thin layer of compact bone.
 Diploe of Skull.
 Core of Short bones is also spongy in nature.