Human Nervous System (2) Flashcards
What are the 2 types of nervous system?
- Central nervous system (CNS)
- Peripheral nervous system (PNS)
What is the CNS made up of?
The central nervous system (CNS) is made up of a concentrated mass of interconnected neurons (nerve cells), group together to form the spinal cord and brain.
How is the CNS protected? (4)
- Connective tissues called meninges
- Cerebrospinal fluid
- The cranium
- Vertebral column
Define cerebrospinal fluid.
A fluid formed from blood plasma in special areas in the walls of the ventricles (cavities within the 🧠)
The extremely soft and delicate tissues of the brain and spin cord are protected and ___ by three connective ___ membranes called meninges.
Nourished
Tissue
The space between the __ and ___ layer of membranes is filled with cerebrospinal fluid which acts a ___, protecting the CNS against shock and damage.
2nd
3rd
Cushion
The whole CNS and its meninges are enclosed within a ____ case made up of two separate structures.
Bony
What does the cranium do?
A strong, dome-shaped structure protects the brain against mechanical injuries. It is made up of eight, curved skull bones, immovably dove-tailed together by fibrous joints called sutures.
What does the vertebral column do?
Surrounds the spinal cord and protects it against mechanical injury.
Other factors, such as the S-shaped ___ of the vertebral column, the _____ discs between vertebrae and the joints of the lower limbs, all prevent jarring of the CNS, giving the body ___ and _____.
Curvature
Cartilaginous
Spring
Resilience
What is the brain?
It is the enlarged upper part of the spinal cord enclosed un a bony cranium,
What is the mushroom part of the brain scape?
Cerebrum
What is the bump at the back of the brain called?
Cerebellum
What is the lower part of the brain stem called?
Medulla Oblongata
