Question

16. How many of the following structures are common
in the left and right lungs of humans?
(a) Horizontal fissure
(b) Oblique fissure
(C) Cardiac notch
(d) Presence of lobes
(1) Two
(2) Three
(3) All four
(4) Only one
​

Answer 1

Answer:

3 lobes at right side and 2 lobes at left

Explanation:

the right lung

The right lung is five centimeters shorter than the left lung to accommodate the diaphragm, which rises higher on the right side over the liver; it is also broader. The volume, the total capacity, and the weight of the right lung is greater than that of the left. The right lung is divided into three lobes.

The Upper Lobe (Right Lung)

The upper lobe is the largest lobe of the right lung. It extends from the apex of the lung down to the horizontal and oblique fissures. It bears apical, anterior, and posterior bronchopulmonary segments.

The Middle Lobe (Right Lung)

The middle lobe is the smallest lobe of the right lung, located between the horizontal and oblique fissures. It bears medial and lateral bronchopulmonary segments

The Lower Lobe (Right Lung)

The lower lobe is the bottom lobe of the right lung. It lies beneath the oblique fissure. It bears medial, lateral, superior, anterior, and posterior bronchopulmonary segments.

the left lung

The human left lung is smaller and narrower that the right lung, and is divided into two lobes, an upper and a lower, by the oblique fissure. The left lung has only two formal lobes because of the space taken up in the left side of the chest cavity by the heart, though it does have the lingula, which is similar to a lobe.

The left lung has a depression on the medial side of its surface called the cardiac notch, a concave impression molded toaccommodate the shape of the heart.

The Upper Lobe (Left Lung)

The upper lobe of the left lung contains anterior and apicoposterior bronchopulmonary segments. It is above the oblique fissure

The Lower Lobe (Left Lung)

The lower lobe of the left lung contains superior, anterior, posterior, medial, and lateral bronchopulmonary segments

The Lingula

The lingula is not formally considered to be a lobe. It is a small, tongue-like projection of the left lung that is analogous to the middle lobe of the right lung. It contains superior and inferior bronchopulmonary segments

Answer 2

Answer:

(1)

Explanation:

Horizontal fissure is only seen in right lung.

Obilique fissures are billateral structures in both lungs, seperating the lobes. Cardiac notch is only seen in right lung. Both lungs have lobes.

So option 1 is correct

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