MICROANATOMY

MUSCLE NERVE CARTILAGE BONE

CARTILAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the main function of the sternum in the skeletal system?
A
the sternum protects the spinal cord from receiving damage.
B
the sternum allows the ribs to expand and contract when a human breathes.
C
the sternum connects bone to bone.
D
the sternum cushions bones to keep them from grinding together.
Explanation: 

Detailed explanation-1: -Protection. Your sternum, along with your ribs, works to protect the organs of your torso, such as your heart, lungs, and chest blood vessels. Support. Your sternum also provides a connection point for other parts of your skeletal system, including your collarbone and most of your ribs.

Detailed explanation-2: -The sternum or breastbone is a vertical bone that resembles a partial T-shape. It forms the front of the rib cage and is connected to the ribs by cartilage. It helps to protect the lungs, heart, and blood vessels from injuries.

Detailed explanation-3: -(STER-num) The long flat bone that forms the center front of the chest wall. The sternum is attached to the collarbone and the first seven ribs. Also called breastbone.

Detailed explanation-4: -The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.

Detailed explanation-5: -During inspiration, the anteroposterior diameter of the thorax is increased when the ribs are raised. Because ribs slope downward, any elevation during inspiration results in an upward movement of the sternum at the manubriosternal joint and an increase in the anteroposterior diameter of the thorax.

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