2006-07-16 11:09:57 · 10 answers · asked by liela119 1 in Pregnancy & Parenting ➔ Newborn & Baby
Because they're the last ones that are needed!! A baby uses her/his heart, kidneys, etc. pretty much the same way she/he will after birth even in the uterus. But breathing liquid is very different from breathing air...so the lungs only develop near the end of pregnancy.
2006-07-16 19:24:27 · answer #1 · answered by Anonymous · 0⤊ 0⤋
its not so much that they are the last organs to develope it more that they are the last to fully mature..that is due in part to the fact that the babie lungs continue to develope after they are born and the birth process itself has a lot to do with the development of the lungs...The lungs continue to develope until about 1 1/2 years of life. There are 4 separate stages of lung development all together 3 take place in utero and the last happens after/during birth.
Look at it this way..the lungs are going from a liquid filled enviroment to a air filled enviroment. The biggest obstacle that a fetus faces in the development of the lungs is surfactant. This is kind of like a coating in the lungs that allows the lungs to expand after the baby takes its first breath. Thanks to the use of steroids this is now something that can be sped up should doctor forsee that a baby may be born prematurely.
I hope I answered your question enough. There really isnt enough space here to get very technical. But if you look up Lung Development online Im sure that you will find what you are looking for in great detail.
2006-07-16 18:27:09 · answer #2 · answered by Heather 4 · 0⤊ 0⤋
They are not the last to develop, they are the last to finish maturing.
It has nothing to do with when the baby will use their lungs. A baby has a full set of taste buds long before birth and it won't use those until it's born. And a baby won't drown if their lungs are fully mature while in utero. The baby is supplied with oxygen from the mother.
The brain continues developing, as does the skull after birth. The heart is fully mature.
I cannot find anything on the net regarding this but it seems to be nature's order of things.
In the last trimester, the baby is simply getting ready for life outside the womb. It is practicing breating motions, it sucks it's thumb, it builds fatty layers under the skin in order to stay warm, and the lungs mature.
This might be a question no one would be able to answer.
2006-07-16 18:23:34 · answer #3 · answered by chele2382 4 · 0⤊ 0⤋
The body has to prioritize, so that everything develops efficiently. The fetus doesn't need to breathe in utero. It doesn't need to be able to breathe until just about the time it's ready to be born. However, the other organs like the heart and brain need to be developed early. The heart is necessary for circulation, and the brain controls all the other functions.
2006-07-16 18:18:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The lungs develop last to allow resources to other organs which are needed sooner. The brain and chest cavity take longer and start sooner. The lungs need a rib cage to grow in.
2006-07-16 18:23:06 · answer #5 · answered by Anonymous · 0⤊ 0⤋
they are the last organ a fetus needs, until it is born the mother provides the oxygen.
2006-07-16 18:13:10 · answer #6 · answered by nobody722 3 · 0⤊ 0⤋
Because they are the only organ that the baby doesn't need in the womb.
2006-07-16 19:33:35 · answer #7 · answered by kendalandsam 3 · 0⤊ 0⤋
because the baby gets all nutrients and oxygen from the mother, if the baby was capable of breathing on it's own to soon, it would drown.
2006-07-16 18:14:06 · answer #8 · answered by Jason H 3 · 0⤊ 0⤋
'Cause the fetus doesn't need them?
2006-07-16 18:13:11 · answer #9 · answered by Pseudo Obscure 6 · 0⤊ 0⤋
because they dont have to breath til they are born
2006-07-16 18:12:58 · answer #10 · answered by no1special 5 · 0⤊ 0⤋