The sternum, also known as the breastbone, is a flat bone located in the center of the chest. It gives attachment to the diaphragm and muscles of the anterior abdominal wall. There are 12 pairs of ribs that articulate posteriorly with the vertebral column and anteriorly with the sternum. Together, the sternum and ribs form a protective rib cage around the lungs and heart.

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2. STERNUM AND RIBS
Presented By Sayan Ghosh
2nd year b.sc nursing
Koshys college of nursing
bangalore
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3. INTRODUCTION
The skeleton system consists of the
bones of the skeleton. Their joints
and the skeleton muscles that
moves the body. Bones are often
thought to be static or permanent,
they are highly vascular living
structures that are continuously
being remodeled.
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4. STERNUM
 It is also known as the breast bone.
 Structure :-
 This is a flat bone.
 It gives attachment to the diaphragm
muscles of the anterior abdominal wall
and the linea alba.
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5. POSITION
Flat and is located in the center of the chest
wall.
It is a flat bone can be felt just under the skin
in the middle of the front of the chest.
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7. Function of the sternum or breast bone :-
It gives attachment to the diaphragm, muscles
of the anterior abdominal wall.
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8. RIBS
Ribs are the
curved
elongated
bones that
articulate
posteriorly with
the vertebral
column . They
get attached
with the
sternum.
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9. CONTD….
 Structure :-
 12 pairs
 Forms the bony lateral walls of the thoracic cage.
 The lowest two parts of the ribs are referred to as the floating ribs ,
don’t joint the sternum at all , their anterior tips are being free.
 Due to the arrangement of the ribs and the quantity of the cartilage
present in the rib cage , it is flexible structure that can change it’s
shape during berating.
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11. POSITION
They are elongated curved bones that articulate
posteriorly with the vertebral column.
Posteriorly :- articulate with thoracic vertebrae.
Anteriorly :- 10 ribs to the sternum.
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12. PARTS OF
RIBS
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13. CONTD….
Function :-
 There are 12 pairs of ribs which
gives attachment of the sternum.
 They together form a cage known as rib cage.
 They protect many vital organs such as lungs , heart etc.
 Between each ribs the intercostals muscles are present which helps in
the respiration during the exhalation and inhalation.
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14. CONCLUSION
Sternum forms the joint with the ribs and they together
form the ribcage which protect the lungs and the
heart from many types of various conditions, which
are the vital organs of our body.
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15. ASSIGNMENT
Draw a neat labeled diagram of
sternum and ribs.
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16. REFERENCE
o Willson and Ross . Anatomy and Physiology in health and illness . 13th
edition , Tortora : Elsevier
o D.Chakraborty , N.Chakraborty . Fundamentals of human anatomy .
1st edition : New central book agency PVT. LTD.
o Moone , keith , Anne Agene . Essential clinical anatomy . 3rd edition ,
USA : lippincott william and willkins
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