Looking Inside: Planes, Cavities & the Spaces Between

Time To Read

1–2 minutes

Date Last Modified

OVERVIEW

PART 1

PART 2

PART 3

PART 4

PART 5

PART 6

PART 7

Quiz

On later visits, Stina gets imaged. To read a scan you have to know how the body is sliced (the planes) and what compartments the slice passes through (the cavities). And inside those cavities is something easy to overlook until it goes wrong: thin, wet serous membranes lining closed spaces and wrapping the organs. Those membranes create a tiny “potential space” – normally just a film of lubricant. Remember that space. It is exactly where Stina’s attacks happen.

A diagram showing the right lower abdominal area with two enhancements on the appendix, one infected and the other uninfected.

Three different serous membranes, one repeating design. Next we sort all four membrane types – and meet the one behind Stina’s “appendicitis.”

NEXT

Four Membranes, One Troublemaker

List of terms