Table 1 Interspecies comparison of 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