What nervous system subdivision that is composed of the brain and spinal cord?
The Central Nervous System: The central nervous system (2) is a combination of the brain (1) and the spinal cord (3). The CNS includes the brain and spinal cord along with various centers that integrate all the sensory and motor information in the body.
What division contains the brain and spinal cord?
The central nervous system (CNS) is the brain and spinal cord, and the peripheral nervous system (PNS) is everything else (Figure 8.2). The brain is contained within the cranial cavity of the skull, and the spinal cord is contained within the vertebral cavity of the vertebral column.
What are the subdivisions of the spinal cord?
The spinal cord is a cylindrical structure of nervous tissue composed of white and gray matter, is uniformly organized and is divided into four regions: cervical (C), thoracic (T), lumbar (L) and sacral (S), (Figure 3.1), each of which is comprised of several segments.
What are two functions of spinal cord?
The main functions of the spinal cord are:
- To conduct reflexes below the neck.
- To conduct messages from the skin and muscles to the brain.
- To conduct commands from the brain to muscles of the trunk and limbs.
What is the relationship between the brain and spinal cord?
Spinal nerves connect the brain with the nerves in most parts of the body. Other nerves go directly from the brain to the eyes, ears, and other parts of the head. This network of nerves carries messages back and forth between the brain and the rest of the body.
What are the two main division of nervous system?
The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
What material is the human brain made of?
Brains are made of soft tissue, which includes gray and white matter, containing the nerve cells, non-neuronal cells (which help to maintain neurons and brain health), and small blood vessels. They have a high water content as well as a large amount (nearly 60 percent ) of fat.
What are the 5 major subdivisions of the spinal cord?
The main functions of the vertebral bones are for structure ( posture ) and protection of the spinal cord. The spine is split into five regions: the cervical, thoracic, lumbar, sacral, and coccyx.
What is the structure and function of the spinal cord?
The spinal cord is part of the central nervous system. This long structure runs down the center of your back, and it mediates messages between the brain and the peripheral nerves. The spinal cord is primarily composed of nerves, which are organized in systematic pathways, also described as tracts.