人死后尸体将经历怎样的变化

1.The last bit of oxygen in your body is used up, and brain activity surges briefly ¹ as neurons stop working and the brain stops secreting ² hormones ³ that regulate body function. , ,The last of the energy stores (ATP) is used up and the sphincter relaxes, causing the body to release urine and excrement ⁴. , ,2. Between 15 and 25 minutes after death, the lack of blood flow to capillaries ⁵ causes the skin to go pale. , ,The heart is no longer beating, so blood is not being propelled around the body. , ,As a result, the blood pools in the lower parts of the body. , ,3. After 12 hours, the skin will have reached maximum discoloration (or a reddish purple colour). , ,Calcium ⁶ leaks into muscle cells, binding ⁷ to proteins which are in charge of muscle contraction ⁸. , ,The stiffness referred to as rigor ¹⁰ mortis sets in three to six hours after death, and lasts for between 24 and 48 hours. , ,4. Dead cells and carbon dioxide causes the PH level of your skin tissue to rise. , ,This makes the cell membrane ¹¹ weak and it bursts, releasing proteins and enzymes ¹² which further break down the surrounding tissue. , ,This is the process of decomposition ¹³. , ,5. Micro-organisms start to break down your body. , ,Bacteria in the gastro-intestinal tract ⁹ eats through the abdominal ¹⁴ organs. , ,This is called putrefaction ¹⁵, and it causes the smell of death associated with a dead body. , ,The breakdown ¹⁶ of amino acids creates other strong-smelling acids which attract insects that lay eggs in the rotting tissue. , ,The eggs hatch after 24 hours and the maggots eventually consume 60 percent of the body tissue over a number of weeks. , ,6. Finally, the maggots create holes in the rotting flesh, which allow decomposition fluids and gases to escape. , ,After a month and a half, beetles ¹⁷ and fungi ¹⁸ further consume the remains ¹⁹. , ,This is called dry decay which can take up to one year. , ,Eventually, every part of the body will have been broken down and used.