Question

multiple choice question

the external abdominal oblique supports which organs against the pull of gravity?

abdominal and thoracic organs
abdominal organs
thoracic organs

Explanation:

Identify the muscle and its anatomical location

The question asks about the external abdominal oblique muscle. This muscle is the largest and most superficial of the three flat muscles of the lateral anterior abdominal wall.

Analyze the physiological function of the muscle

The muscles of the anterior and lateral abdominal wall, including the external abdominal oblique, function to contain and protect the abdominal viscera. By maintaining muscle tone, they compress the abdomen and support the internal organs of the abdominal cavity against the downward pull of gravity.

Evaluate the options based on anatomical boundaries

• Abdominal and thoracic organs: The thoracic organs (such as the heart and lungs) are housed within the thoracic cavity, protected and supported by the rib cage and the diaphragm, not the abdominal wall muscles.
• Abdominal organs: These organs reside in the abdominopelvic cavity and rely directly on the muscular abdominal wall for anterior and lateral support against gravity.
• Thoracic organs: As noted, these are supported by the thoracic skeleton and diaphragm.

Therefore, the external abdominal oblique specifically supports the abdominal organs.

Answer:

• Abdominal and thoracic organs
• Abdominal organs (Correct answer)
• Thoracic organs