The basilar membrane is stiffened along its entire length.

compound eyes with multiple ommatidia

sensory adaptation

rods and cones

one motor neuron and all of the muscle fibers on which it has synapses

the humerus to the scapula

5 → 3 → 2 → 1 → 4

ganglion cells

exoskeleton of insects

cartilaginous fishes, including sharks

myosin cross-bridges binding to actin and transitioning from a high-energy to a low-energy state

chemoreceptors

stimulus reception → sensory transduction → sensory perception → sensory adaptation

olfactory bulb