Realtime Workshop Code Generation - Meaning of MdlInitializeSizes Parameters

Q: Can somebody give me a brief description of the following parameters?

Model->Sizes.numContStates   = (0);/* Number of continuous states */
Model->Sizes.sysDirFeedThru  = (1);/* The model is direct feedthrough */
Model->Sizes.numSampTimes    = (1);/* Number of sample times */
Model->Sizes.numBlocks       = (187);/* Number of blocks */
Model->Sizes.numBlockIO      = (94);/* Number of block outputs */
Model->Sizes.numBlockPrms    = (3424);/* Sum of parameter "widths" */

I tried to find anything via Google and forum search function but wasn't very lucky. Need a bit more information than the code comments.

Any help would be greatly appreciated. Thanks in advance!