Air movement in body cavities

  • I
  • Thread starter tanas
  • Start date
  • #1
2
0
Can someone explain why air rises to the highest point in the body cavities like peritoneal/pleural?
 

Answers and Replies

  • #2
jbriggs444
Science Advisor
Homework Helper
9,570
4,234
Can someone explain why air rises to the highest point in the body cavities like peritoneal/pleural?
For the same reason that [a heavier than flesh] fluid sinks to the bottom of such cavities.
 
  • #3
sophiecentaur
Science Advisor
Gold Member
2020 Award
25,475
5,002
Can someone explain why air rises to the highest point in the body cavities like peritoneal/pleural?
Bubbles?
 
  • #4
2
0
Buoyant force? I guess that that we can assume that gas in cavities is actually submerged in fluid? There is tiny amout of fluid in this cavities that keep organs and serous surface stick to each other by surface tension.
 
  • #5
sophiecentaur
Science Advisor
Gold Member
2020 Award
25,475
5,002
Buoyant force? I guess that that we can assume that gas in cavities is actually submerged in fluid? There is tiny amout of fluid in this cavities that keep organs and serous surface stick to each other by surface tension.
Although there could well be small amounts of gas in amongst our organs, they are likely to be dissolved eventually in the fluids. Any small amounts of gas can give severe discomfort, as in decompression sickness, which is suffered by divers and air embolisms. CO2 is not too much of a problem because it dissolves but tiny nitrogen bubbles which have come out of solution as the pressure reduces take a long time to dissolve, once they have joined together. Hence, divers decompress slowly enough to let the body get rid of the tiny bubbles.
Large amounts of gas are definitely not a good idea. I had laparoscopic surgery, some years ago and they fill your peritoneum with CO2 to separate out the organs so that they can work in there. The sensation afterwards was truly weird. I likened it to having a bag of groceries in there until the CO2 gradually passed out (via the normal route!) and the organs nestled together again, properly.
 

Related Threads on Air movement in body cavities

  • Last Post
Replies
9
Views
3K
Replies
1
Views
1K
Replies
6
Views
845
  • Last Post
Replies
17
Views
1K
  • Last Post
Replies
12
Views
5K
  • Last Post
Replies
12
Views
4K
Replies
10
Views
2K
Replies
6
Views
5K
Replies
2
Views
574
  • Last Post
Replies
7
Views
3K
Top