This is a file from the Wikimedia Commons. The description on its description page there is shown below.
Description
English:based on the graphics from en wiki: "Diagram of a typical animal cell. Organelles are labelled as follows: Image File history File links Commons-logo. ...
File history from en (as per gfdl requirements) (cur) 12:28, July 3, 2003 . . Nate Silva . . 600x402 (201229 bytes) (shrunk with pngcrush) (rev) 14:49, November 4, 2002 . . Magnus Manske . . 600x402 (237038 bytes) (By Magnus Manske (from Nupedia, reproduced with permission;-))