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Question

Which of the following option is correct regarding the characteristics of the diaphragm?


(A) Found in mammals.
(B) Separate the thoracic and Abdominal cavity.
(C) Formed by inter-costal muscles.
(D) Due to its contraction volume of thoracic cavity increases on Anterior-Posterior axis.

A
A, C and D are correct
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B
A, B and D are correct
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C
B, C and D are incorrect
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D
A, B and C are incorrect
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Solution

The correct option is A A, C and D are correct
  • The diaphragm is the type of skeletal muscle found in mammals which plays a major role in respiration. It is a dome-shaped structure and moves in and out at the time of respiration. Its muscles separate the thoracic cavity having heart and lungs from the abdominal cavity.
  • During inhalation, the diaphragm contracts and chest cavity increases to get more oxygen while in exhalation diaphragm relaxes and the chest cavity decreases and releases carbon dioxide.

So, the correct option is 'Found in mammals, Separate the thoracic and Abdominal cavity, and Due to its contraction volume of the thoracic cavity increases on Anterior-Posterior axis'.

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