PHYLUM ECHINODERMATA. Characteristics: Endoskeleton Calcareous (calcium carbonate) Ossicles arise from mesodermal tissue Pentaradial symmetry as adults.
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Chapter 45: Sensory Systems CHAPTER 45 Sensory Systems.
NOTES: CH 48 Neurons, Synapses, and Signaling. A nervous system has three overlapping functions: 1) SENSORY INPUT: signals from sensory receptors.
Introduction to Health Science Special Senses. Description of the Special Senses Smell Smell – Smell occurs when specialized cells in the nose (chemoreceptors)
3. Receptors Rods – sense low levels of light Cones – sense higher level blue, green & red light Fig. 10.36.
10 Demo: Print: Supplies:. Warm-Up Exercise 1.A mirror reflects an object at a distance of 10 cm with an image that is 18 cm away. 1.Where is the focus?
