My son who is in 1st grade checked out a children's book from the local library called "Mummies" by Joyce Milton (1996). In it are pictures of preparing a body for mummification. Below I have included scans of these two images. Notice the stark similarities between these images and Facsimile 1 from the book of Abraham, also appearing below.
Here's Facsimile 1 from the Book of Abraham in the Pearl of Great Price:
To see Joseph Smith's interpretation of this image see the official source here: http://scriptures.lds.org/en/abr/fac_1
The jars under the altar in Facsimile 1 match those in the children's book and were used to store the removed lungs, liver, stomach and intestines.
We know that the original papari were found in the '60s and found to be funeral scrolls. This children's book further demonstrates this facsimile as being part of the funeral scrolls preparing the body for mumification. See this link for more information on the book of Abraham: http://www.lds-mormon.com/book_of_abraham.shtml