The complexity of the central nervous system is amazing: there are approximately 100 billion neurons in the brain and spinal cord combined. As many as 10,000 different subtypes of neurons have been identified, each specialized to send and receive certain types of information.
What tissue is the brain and spinal cord made of?
Nervous tissue is found in the brain, spinal cord, and nerves.
What cells is the spinal cord made of?
Like the brain, the spinal cord consists of gray and white matter. The butterfly-shaped center of the cord consists of gray matter. The front wings (usually called anterior or ventral horns) contain motor nerve cells (neurons), which transmit information from the brain or spinal cord to muscles, stimulating movement.
Why is it important to protect the brain and spinal cord?
It controls hunger and thirst and some of the most basic body functions, such as body temperature, blood pressure, and breathing. The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cushioned and protected by cerebrospinal fluid.
What is the relationship between the brain and spinal cord?
The brain controls everything we do and how our body functions. It sends electrical messages along the spinal cord and the nerve fibres to all the parts of our body. The nerve fibres also bring electrical messages back to the brain. The different areas of the brain control the different parts of our body.
What is the biggest part of the brain?
The forebrain is the largest and most highly developed part of the human brain: it consists primarily of the cerebrum (2) and the structures hidden beneath it (see “The Inner Brain”). When people see pictures of the brain it is usually the cerebrum that they notice.
What is GREY matter in the spinal cord?
Grey matter refers to unmyelinated neurons and other cells of the central nervous system. It is present in the brain, brainstem and cerebellum, and present throughout the spinal cord. … The grey matter in the spinal cord consists of interneurons, as well as the cell bodies of projection neurons.
Do brain cells grow back?
Summary: When adult brain cells are injured, they revert to an embryonic state, say researchers. In their newly adopted immature state, the cells become capable of re-growing new connections that, under the right conditions, can help to restore lost function.