The decomposition of a human body after death is a complex process and can vary greatly depending on various factors such as the environment, temperature, and presence of insects¹²³⁴. Here's a general timeline:

- **24-72 hours after death**: The internal organs decompose⁴.

- **3-5 days after death**: The body starts to bloat and blood-containing foam leaks from the mouth and nose⁴.

- **8-10 days after death**: The body turns from green to red as the blood decomposes and the organs in the abdomen accumulate gas⁴.

- **1 year**: A body buried within a typical coffin usually starts to break down¹.

- **Up to a decade**: The body fully decomposes, leaving only the skeleton¹.

In a temperate climate, it usually requires three weeks to several years for a body to completely decompose into a skeleton³. However, a body buried without a coffin, which doesn't have protection from insects and other elements, typically skeletonizes within five years¹.

Please note that these are average times and actual decomposition can vary based on many factors. It's a natural process that involves the breakdown of organic material into simpler forms².