# Internal free space? Air or Vacuum?

**URL:** <https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988>\
**Category:** Factual Questions\
**Created:** [June 11, 2000, 1:04am UTC](https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988 "2000-06-11T01:04:48Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![insider](https://avatars.discourse-cdn.com/v4/letter/i/bbe5ce/32.png) [@insider](https://boards.straightdope.com/u/insider)\
**Post date:** [June 11, 2000, 1:04am UTC](https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988/1 "2000-06-11T01:04:48Z")

</div>

In the spaces between the internal organs in the body, is there air of a vacuum?

---

<div class="post-metadata">

**Author:** ![Jimpy](https://avatars.discourse-cdn.com/v4/letter/j/c68b51/32.png) [@Jimpy](https://boards.straightdope.com/u/Jimpy)\
**Post date:** [June 11, 2000, 1:11am UTC](https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988/2 "2000-06-11T01:11:22Z")

</div>

Neither, the body tends to fill the free spaces on the body with liquid (mostly water). If there were any spaces, the gasses on the blood would come out of solution, the there would be air (or at least gasses in the ratio at which blood dissolves them).

---

<div class="post-metadata">

**Author:** ![JonF](https://avatars.discourse-cdn.com/v4/letter/j/cab0a1/32.png) [@JonF](https://boards.straightdope.com/u/JonF)\
**Post date:** [June 11, 2000, 12:38pm UTC](https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988/3 "2000-06-11T12:38:09Z")

</div>

Any gaseous space that there might be in your body is not a vacuum. It’s probably at the same pressure as the external atmosphere, although it could possible be at a higher pressure of your muscles were somehow compressing it. If it were a vacuum, it wouldn’t be so for long; the liquids in your body would “boil” and fill it up with gas.

---

<div class="post-metadata">

**Author:** ![Duck\_Duck\_Goose](https://avatars.discourse-cdn.com/v4/letter/d/50afbb/32.png) [@Duck\_Duck\_Goose](https://boards.straightdope.com/u/Duck_Duck_Goose)\
**Post date:** [June 12, 2000, 12:21am UTC](https://boards.straightdope.com/t/internal-free-space-air-or-vacuum/21988/4 "2000-06-12T00:21:43Z")

</div>

If you have gas in your body, GasX works well. Also anything with simethicone.