K12 - Communication
Introduction
Biological communication occurs at many levels, from one cell communication with its neighbour in a tissue (paracrine, to signals released into the blood from one cell to signal to another cell or tissue (endocrine or hormone signaling). The signalling that occurs in the brain, spinal cord and other nervous tissues involves electrical (action potentials) signaling.
This page will introduce development of signaling in our special sensory nervous systems: the eyes for vision and the ears for hearing. Both systems convert signals in one medium (light or sound) into an electrical signal that our brain can understand.
- This content is only as a brief introduction, designed for K12 students. More detailed information can be found on the listed linked pages.
Sound - Hearing
This cartoon shows the adult "ear" with the 3 main divisions (outer, middle, inner).
Vision - Light
This cartoon[1] shows the eyeball (left), a cartoon of the retinal cell organisation (middle) and an actual slice of the human retina.
The Eye
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Retinal Cell Organization
These are the names of the cells and neurones required to convert light into electrical signals. (detect, process and carry)
Notice that light has to pass through all the other cell layers to the detection cell layer. |
Glossary Links
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Cite this page: Hill, M.A. (2024, April 27) Embryology K12 - Communication. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/K12_-_Communication
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
- ↑ <pubmed>20855501</pubmed>| PMC3101587 | JCB