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Table 1 Interspecies comparison of Lung lobes

From: A left lung with four lobes: a new discovery during the thoracotomy for recurrent primary spontaneous pneumothorax

 

Number of right lung lobes

Description of right lung lobes

Number of left lung lobes

Description of left lung lobes

Human (1, 2)

3

2

Dog (2, 3)

4

Cranial, middle, caudal, and accessory lobes

2 or 3

Apical, middle, and diaphragmatic lobes, left apical and middle lobes are partially fused, being separated only by an incomplete (cranial) fissure

Cat (2, 4)

4

Cranial, middle, caudal and accessory lobes

2 or 3

Apical (cranial), middle (cardiac), and diaphragmatic (caudal) lobes (3 lobes theory) versus apical (cranial) and diaphragmatic (caudal) lobes (2 lobes theory)

Bovine (5)

4

Cranial, middle, caudal and accessory lobes

2

Cranial and caudal lobes

Horse (2, 6)

1

Cranial, middle, caudal and accessory lobular divisions are united to form 1 lobe

1

Cranial, middle, caudal and accessory lobular divisions are united to form 1 lobe

Raccoon (2)

4

3

Equine (7)

3

cranial, caudal and accessory lobes

2

Cranial and caudal lobes

Mouse (2, 9, 10)

4

Cranial, middle, caudal, and accessory lobes

1

No division

Rat (2, 10, 11)

4

Upper, middle, accessory and lower lobes

1

The upper and accessory lobes are lost. The middle and lower lobes are united to form one lobe

Hamster (11)

5

cranial, middle, caudal, intermediate, accessory

1

Single lobe