|
Appendix 2
The Development of the Unborn Child's Body
|
Lungs
|
Timing
|
Source |
The lung bud is present.
|
Day 22 |
Sadler, p 210 |
| The lung bud appears. |
Days 22-24 |
Larsen, p 82 |
| Lung buds may be seen. |
Day 27 after conception |
Rugh, p 43 |
| The lung bud branches into left and
right bronchial buds. |
Days 26-28 |
Larsen, p 82 |
| The lung bud appears. |
Approximately 4th week of development |
Sadler, p 260 |
| The lung bud develops. |
4th week after fertilization |
Moore, p 262 |
| Bronhci begin to form in the right
and left lung. |
7th week after fertilization |
Moore, p 262 |
| The lungs have lobes and many-branched
bronchioles. |
8th week after conception |
Rugh, p 53 |
|
