NEET BIOLOGY

HUMAN PHYSIOLOGY

BREATHING AND RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the main bone structure that protects the lungs?
A
Vertebrae
B
Rib cage
C
Skull
D
Pelvis
Explanation: 

Detailed explanation-1: -The rib cage consists of 24 ribs (2 sets of 12), which are attached to a long, flat bone in the centre of the chest called the sternum. The ribs are connected to the sternum with a strong, somewhat flexible material called cartilage.

Detailed explanation-2: -The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.

Detailed explanation-3: -The sternum, together known as the thoracic cage, is a semi-rigid bony and cartilaginous structure which surrounds the thoracic cavity and supports the shoulder girdle to form the core part of the human skeleton.

Detailed explanation-4: -Rib cage occupies the chest region. It is cone-shaped structure made up of 12 pairs of ribs. Ribs are attached to vertebrae at the back which curve around to form a cage. 10 pairs of ribs are attached to the breast bone at the front.

Detailed explanation-5: -The rib cage is formed by the 12 thoracic vertebrae, the 12 pairs of ribs, the sternum, and the costal cartilages. Posteriorly, the ribs articulate with the vertebral bodies. The head of the first, tenth, eleventh, and twelfth ribs each articulate with a single vertebra.

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