Question

why ur left lung slightly smaller and has only two lobes​

Answer 1

Answer:

The left lung is smaller because of the space taken up by the heart (see diaphragm for an image of this). Each lung is separated into lobes branching off the main bronchus; the right lung has three lobes, while the left has only two lobes. ... The lungs are "stuck" to the inside of the thorax, also by surface tension.

Answer 2

Answer:

as it has to accomodate heasrt in between. ...