The Nervous System and The Eye 4.0 / 5 based on 1 rating ? BiologyCells, tissues and organsIGCSEOther Created by: oisin.555Created on: 05-11-16 11:29 Contents of CNS Brain and spinal chord 1 of 10 Contents of PNS Peripheral nerves: Motor nerve, Sensory nerve 2 of 10 What is the stimulus flowchart: Stimulus > Receptor > Central nervous system > Effector > response 3 of 10 Sensory neurones... ...carry signals from sense organs to the spinal chord and brain. 4 of 10 Relay neurones... ...carry messages from one part of the CNS to another 5 of 10 Motor neurons... ...carry signals from the CNS to muscles and other effector organs 6 of 10 Cornea - Front part of the tough outer coat, the sclera. It is convex and transparent Function: The cornea protects front part of eye and bends light to form an image on the retina. 7 of 10 Ciliary muscle - Ring of muscle fibres around the lens Function: Controls lens thickness and curvature 8 of 10 Suspensory ligaments - Ligament between lens and ciliary muscle Function: Supports lens and connects it to the ciliary muscle 9 of 10 Optic nerve - Bundle of sensory neurones at back of eye. Function: Carries signals from the photoreceptors of the retina to the brain. 10 of 10
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