Answer:

1.their heartbeat and blood circulation slow down.

2three weeks to several years

3.flies, beetles, nematodes, scavengers, mites, and other creatures that have come to eat your remains all have their own bacteria, too.

Explanation:

1.When someone is dying, their heartbeat and blood circulation slow down. The brain and organs receive less oxygen than they need and so work less well. In the days before death, people often begin to lose control of their breathing.

2.In a temperate climate, it usually requires three weeks to several years for a body to completely decompose into a skeleton, depending on factors such as temperature, humidity, presence of insects, and submergence in a substrate such as water.

3.Bacteria from the environment and from your body itself are a huge factor in breaking down your flesh, but they won't be alone. The flies, beetles, nematodes, scavengers, mites, and other creatures that have come to eat your remains all have their own bacteria, too. And lucky you, they're willing to share.