1. Sense organs
Lab 12

2. Animal eyes Invertebrate eyes: compound eye (eg. arthropods)
camera-type eye (eg. squid)
Vertebrate eyes:

4. © Lennart Nilsson, from The Incredible Machine
Photoreceptors
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
ion
channels
close
membrane of disk
cascade of reactions
rod cell
light
rays
outer segment
cone cell
ion channels
in plasma
membrane
retinal
inner segment
cell body
opsin
nucleus
Membrane of disk
Rhodopsin molecule
(opsin + retinal)
synaptic
vesicles
20 µm
synaptic endings
© Lennart Nilsson, from The Incredible Machine

5. b: © Biophoto Associates/Photo Researchers, Inc.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
sclera
choroid
rod cell
and cone
cell layer
a. Location of retina
bipolar
cell layer
retina
optic
nerve
ganglion
cell layer
axons of
ganglion cells
b. Micrograph of retina
blind
spot
to optic nerve
light rays
b: © Biophoto Associates/Photo Researchers, Inc.

6. Animal ears
Detecting sound waves
Organs of balance

9. Human Skin
The receptors in human skin a sensitive to touch, pain, temperature, and pressure.

11. Dissect cow eyes and identify the three layers and the related structures