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Human Body Communication System.
We have the ability to communicate externally with the outside world using our special senses, which are sight, hearing, smell, taste and touch. Similarly, communication within our bodies is necessary for our survival. Both internally and externally, this communication involves the cycle of receiving information, processing the information, and responding to the information.
Our internal communications mainly involves two of our bodies systems, the nervous system and the endocrine system, both of which are important for the maintenance homeostasis and the regulation of our vital body functions.
The nervous system consists of a vast number of units called Neurones, which are commonly referred to as simple nerves; each one basically consists of a nerve cell, dendrites, an axon and boutons (Synaptic Knobs). The job of the neurone is to relay messages from one part of the body to another, they can either be sensory such as the feel of heat which would send an input to the brain, or they are afferent such as to create a movement which would be an output from the brain.
The dendrites are the receivers which through the synapse (the gap between transmitter and receiver); receive electrical stimuli from the transmitting bouton of a preceding neurone. This stimuli is transformed into an impulse that travels the length of this neurone through the axon towards its boutons, in turn these boutons will deliver their message.
An example could be simply to lift ones arm; the brain would generate the message and send impulses through the system that would eventually stimulate the required muscles to contract thus lifting the arm.
The endocrine system consists of glands widely separated from one another with no direct anatomical link, commonly referred to as ductless glands due to the fact that their secreted hormones pass directly into the blood stream. A hormone being a chemical messenger which having been produced in one organ or gland is carried through the blood to another organ or tissue, known as the target, the target will then act in response to the chemical message by either producing or ceasing production of its hormone. The endocrine system consists of several distinct glands, and some tissues within other organs: -
· The Hypothalamus (actually classified as part of the brain but has a direct controlling effect on the pituitary gland and indirectly affects many others.
· 1 Pituitary Gland
· 1 Thyroid Gland
· 4 Parathyroid Glands
· 2 Adrenal (suprarenal) Glands
· Islets of Langerhans in the Pancreas
· 1 Pineal Gland or Body
· 2 Ovaries in the Female
· 2 Testes in the Male
An open example of hormone communication could be; when gland ‘x’ releases hormone ‘x’, this stimulates target cells to release hormone ‘y’. When there is excess amount of hormone ‘y’, gland ‘x’ will sense this and inhibits its release of hormone ‘x’. This type of system is known as a negative feedback system, it balances blood glucose levels and temperature etc.
This is a very brief hub but please comment if you have anything to say or add!