The occurrence of mucus in urine can be a symptom of various abnormalities of the immune system, the excretory system and/or the reproductive system. Mucus in urine may also indicate the presence of underlying conditions such as urinary tract infection, cystitis or calculi.
The brain sends messages through the spinal cord and nerves of the peripheral nervous system to control the movement of the muscles and the function of internal organs. The basic working unit of the nervous system is a cell called a neuron. The human brain contains about 100 billion neurons.
1 Autonomic nerves. These nerves control the involuntary or partially voluntary activities of your body, including heart rate, blood pressure, digestion, and temperature regulation.  Motor nerves. These nerves control your movements and actions by passing information from your brain and spinal cord to your muscles.