The somatic nervous system includes the sensory and motor nerves that innervate the limbs and body wall. Sensory nerve fibers in the peripheral nerves are the peripheral axonal process of neurons in the dorsal root ganglion.he somatic nervous system includes the sensory and motor nerves that innervate the limbs and body wall. Sensory nerve fibers in the peripheral nerves are the peripheral axonal process of neurons in the dorsal root ganglion.
Lightning damages the human body. It kills people directly close to trees or the ground. The kind of lightning that usually hits people is cloud to ground lightning. Lightning can affect all organs in the body. A lightning strike can give you cardiac arrest which is when your heart stops beating. Lightning can change the hearts rhythm but the heart usually resumes its normal heart rhythm. CPR can often revive these people.
The resistance of human skin varies between 1,000 ohms (wet skin) to 100,000 (dry), so the lethal voltages are 200V and 20,000V respectively. A 400g heart (the most a healthy heart can weigh) might take up to 27,000V. At high voltages, extra physics comes into play. For example, only ten per cent of lightning strikes are fatal. Most injuries result from arc flash - the intense heat, light and pressure from the sudden heating effect of electrical currents.