BODY PARTS:
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Body parts (leftovers) last 20 seconds per gram.
  10g =   3m20s
 100g =  33m20s
1000g = 333m20s 
The weight of leftovers depends on the weight of the corpse. In the formulas
used, "w" is the weight transformed from kg to gram (ie, divided by 1000).
Leftovers decay after 9 minutes, unless carried.

Humanoid creatures can have any of these bodyparts (random) in this order:
  5 teeth, a skull, 2 thighbones, 2 kneecaps, a jaw, 2 ribs, 2 ears,
  a scalp, 2 fingers, 2 toes, 5 nails, a heart, a nose, 2 eyes, 2 kidneys,
  2 intestines, 2 meats
Default weight seems to be 70kg.
These are considered humanoid creatures:
  human (hum), dwarf (dwa), goblin (gob), gnome (gno), half-elf (h-e), elf,
  orc, ogre mage, uruk, hobbit (hob), kender (ken), zombie, gibberer, demon,
  player, alchemist, frog, blacksmith, uruk-hai
                formula    70kg  time
  5 teeth        fixed     10g   3m20s
  a skull         10w     700g 233m20s
  2 thighbones    10w     700g 233m20s
  2 kneecaps       2w     140g  46m40s
  a jaw            2w     140g  46m40s
  2 ribs           4w     280g  93m20s
  2 ears            w      70g  23m20s
  a scalp          3w     210g  70m   
  2 fingers        2w     140g  46m40s
  2 toes           2w     140g  46m40s
  5 nails        fixed     10g   3m20s
  a heart          4w     280g  93m20s
  a nose         fixed     10g   3m20s
  2 eyes         fixed     10g   3m20s
  2 kidneys        3w     210g  70m
  2 intestines    15w    1050g 233m20s
  2 meats         15w    1050g 233m20s

young human heart          10g   3m20s  Annie @ TIsle Farm

animal: 4 teeth, skull
animal skull:         10g  3m20s
animal tooth:         10g  3m20s
animal intestine:     10g  3m20s   Wolves @ TIsle. Destructs if dropped (0s).
lion claw:            10g  3m20s   Lions @ TIsle. Destructs if dropped (0s).

sewer rat: 2 kidneys, 4 teeth, 2 ears, 1 intestine
sewer rat tooth:      10g  3m20s
sewer rat ear:        10g  3m20s
sewer rat kidney:     10g  3m20s
sewer rat intestine:  10g  3m20s

orc brain: Eating it => "You feel more stupid." (no affect, though)