- Sat Aug 30, 2025 5:32 pm#8884
31. The brain is 60% fat. It’s built on fat, although it runs on glucose.
32. The slowest signal transmission in the human body occurs within the skin. It is the largest organ of the body and sense organs, which transmit sig-nals at 1 mile per hour.
33. An optic nerve, which is also known as the cranial nerve, is the fundamental part of the central nervous system and the most significant sensory nerve of the human eye.
34. Some neurons have an insulating layer known as the myelin sheath. This allows nervous impuls-es to travel faster, with less energy lost.
35. There are 43 pairs of nerves in the peripheral nervous system.
36. Vitamin B, Sodium, proteins, and other mineral ions, including potassium, magnesium, and calci-um ions, are equally essential nutrients required for maintaining the healthy and proper functioning of our nervous system.
37. Our brains have that wrinkly, walnut shape be-cause the white matter constrains the fast maturity of the brain’s external or outer brain (the gray mat-ter).
38. Glial cells are support cells for neurons. They can make myelin to surround part of the neuron. They can also get rid of microbes and help supply nutrients to the neurons.
39. Info in the nervous system can travel as fast as 268 miles per hour (431 kph)!
40. The nervous system cannot efficiently repair itself.
41. Every person’s body contains billions of nerve cells (neurons).
42. The longest and widest single nerve in the human body is the sciatic nerve.
43. The basic unit of the nervous system is the neuron. These specialized cells have a cell body or soma, axons, and dendrites.
44. The average human brain contains about 86 billion neurons.
45. Every square inch of your skin contains around 1,300 pain receptors but only about 100 receptors for pressure, 40 for cold and 6 for warmth.
46. A newborn baby loses about half of their nerve cells before they are born,
47. There are about 13,500,00 neurons in the hu-man spinal cord.
48. The neuron consists of long cables-like exten-sions that protrude out of its body termed axons and short, thick extensions termed dendrites
49. Primates, including humans, have a group of neurons called mirror neurons. These are respon-sible for some behaviors being contagious, such as yawning.
50. Your nervous system cannot function properly in the absence of potassium and sodium ions. Vit-amin B is equally essential for your nervous sys-tem.
51. The body has a nervous system for preparing the body for action.
52. The nervous system is the primary control sys-tem of our body as it is involved in every function, from breathing, generating and receiving respons-es, controlling the muscles, and sensing heat, cold, and a lot more.
53. The brain uses more of the body’s energy than the rest of the organs, using over 20% of the ener-gy reserves in the body.
54. The brain is hard at work even when you’re sleeping.
55. The right optic nerve crosses over the left and transmits a signal to the left side of the brain, while the left optic nerve transmits signals to the right side.
56. The more we learn, the more electrical connec-tions are generated in our brains.
57. We lose neurons as we age, starting at around 20 years old in humans. 1/10 of our neurons are gone by the time we turn 75.
58. Neuronal cells do not undergo the process of mitosis or cell division; hence they do not have growth or repair capacity.
59. The left side of the human brain controls the right side of the body and the right side of the brain controls the left side of the body.
60. The brain requires and utilizes more energy than any other organ in the body.
61. Neurons are programmed to do different things.
32. The slowest signal transmission in the human body occurs within the skin. It is the largest organ of the body and sense organs, which transmit sig-nals at 1 mile per hour.
33. An optic nerve, which is also known as the cranial nerve, is the fundamental part of the central nervous system and the most significant sensory nerve of the human eye.
34. Some neurons have an insulating layer known as the myelin sheath. This allows nervous impuls-es to travel faster, with less energy lost.
35. There are 43 pairs of nerves in the peripheral nervous system.
36. Vitamin B, Sodium, proteins, and other mineral ions, including potassium, magnesium, and calci-um ions, are equally essential nutrients required for maintaining the healthy and proper functioning of our nervous system.
37. Our brains have that wrinkly, walnut shape be-cause the white matter constrains the fast maturity of the brain’s external or outer brain (the gray mat-ter).
38. Glial cells are support cells for neurons. They can make myelin to surround part of the neuron. They can also get rid of microbes and help supply nutrients to the neurons.
39. Info in the nervous system can travel as fast as 268 miles per hour (431 kph)!
40. The nervous system cannot efficiently repair itself.
41. Every person’s body contains billions of nerve cells (neurons).
42. The longest and widest single nerve in the human body is the sciatic nerve.
43. The basic unit of the nervous system is the neuron. These specialized cells have a cell body or soma, axons, and dendrites.
44. The average human brain contains about 86 billion neurons.
45. Every square inch of your skin contains around 1,300 pain receptors but only about 100 receptors for pressure, 40 for cold and 6 for warmth.
46. A newborn baby loses about half of their nerve cells before they are born,
47. There are about 13,500,00 neurons in the hu-man spinal cord.
48. The neuron consists of long cables-like exten-sions that protrude out of its body termed axons and short, thick extensions termed dendrites
49. Primates, including humans, have a group of neurons called mirror neurons. These are respon-sible for some behaviors being contagious, such as yawning.
50. Your nervous system cannot function properly in the absence of potassium and sodium ions. Vit-amin B is equally essential for your nervous sys-tem.
51. The body has a nervous system for preparing the body for action.
52. The nervous system is the primary control sys-tem of our body as it is involved in every function, from breathing, generating and receiving respons-es, controlling the muscles, and sensing heat, cold, and a lot more.
53. The brain uses more of the body’s energy than the rest of the organs, using over 20% of the ener-gy reserves in the body.
54. The brain is hard at work even when you’re sleeping.
55. The right optic nerve crosses over the left and transmits a signal to the left side of the brain, while the left optic nerve transmits signals to the right side.
56. The more we learn, the more electrical connec-tions are generated in our brains.
57. We lose neurons as we age, starting at around 20 years old in humans. 1/10 of our neurons are gone by the time we turn 75.
58. Neuronal cells do not undergo the process of mitosis or cell division; hence they do not have growth or repair capacity.
59. The left side of the human brain controls the right side of the body and the right side of the brain controls the left side of the body.
60. The brain requires and utilizes more energy than any other organ in the body.
61. Neurons are programmed to do different things.
