COORDINATORS
1. NERVOUS SYSTEM
The nervous system is a complex structure of nerves of neurons that transmit signals around the body to coordinate actions.
In invertebrated living beings: it is very simple. Nervous net and ganglion system (jellyfish, grasshooper)
In vertabrated living things:
Central nervous system: brain and spinal cord
Peripheral nervous system: nerves.
The brain is protected by the skull, and the spinal cord by the skeletal vertebrae.
Nerves can be:
Sensory nerves: change light, touch and sound into neural signals which are sent back to our CNS to help our body understand and react to its surroundings.
Motor nerves: transmit neural signals to activate muscles or glands. The nervous system can transmit signals at speeds of 100m/s.

	Created by aubavc almost 9 years ago

Natural Sciences (Relationship and coordnaion) Note on Coordinators, created by aubavc on 20/05/2015.