Answer:
Vitreous humor, bile, gastric content
Step-by-step explanation:
Vitreous humor is the gel-like substance that fills the eye. It is collected using a hypodermic needle. A single eye yields about 2–3 mL of vitreous humor. Vitreous humor is least likely to get contaminated by other body fluids. Also, it is less susceptible to microbial contamination, which makes it important evidence. Vitreous humor is mainly used to detect blood alcohol concentrations. Hence, it is significant in cases of motor accidents, sui/cides, and homicides.
The fluid produced by the liver and stored in the gallbladder is known as bile. For postmortem analysis, it is collected using a hypodermic syringe. Sometimes, to avoid contamination, it is necessary to tie the gallbladder prior to collection. Many drugs and heavy metals accumulate in bile. Hence, bile is important evidence where there is a possibility of metal poisoning or drug poisoning.
Gastric content is valuable in cases of poisoning. It is used for initial screening because undigested substances may appear in the gastric content. Sometimes, the odor of the gastric content can provide a clue about what may be present in the sample, for example, pesticide or cyanide.