cơ quan cảm giác p1

Figure 12.1
Sensory Receptors in Skin
Free nerve
endings
Thermo-,
light touch,
and pain
receptors
Modified and encapsulated
nerve endings
Merkel disks:
light touch
Hair
Free nerve
endings:
sense
changing
position
of hairs
Meissner’s
corpuscle:
light touch
Pacinian
corpuscle:
deep pressure
and high-
frequency
vibration
Ruffini endings:
pressure

Epidermis
Subcutaneous
layer
Dermis
Figure 12.5d
Locations and Structure of the
Receptors for Taste
Figure 12.6
Olfactory Receptors and the Mucus-
Producing Olfactory Glands
Figure 12.9
Structure of the Human Ear
Figure 12.10
Structures and Function of the
Cochlea
Figure 12.13a–c
Sensing Head Position and
Acceleration
Figure 12.14
Structure of the Eye
Canal of
Schlemm
Iris
Lens
Pupil
Cornea
Aqueous
humor
Ciliary
muscle

Sclera
Choroid
Vitreous
humor
Retina
Fovea
Optic
disk
Optic
nerve
Figure 12.16a
Examples of Abnormal Vision
Figure 12.16b
Examples of Abnormal Vision
Figure 12.16c
Examples of Abnormal Vision
Figure 12.16d
Examples of Abnormal Vision
Figure 12.17
Structure of the Retina
•
Receptors and Sensations
A. Each receptor is more sensitive to a
specific kind of environmental
change but is less sensitive to
others.
receptor
Anatomy of the Brain
Motor and Sensory areas of the left Cerebral Cortex

Inferior view of the brain
Cranial Nerves
Sensory afferent pathway through the dorsal root
Motor efferent pathway through the ventral root
Referred Pain
Visceral pain may be felt at these surface regions
Dermatomes
Visceral pain may be felt at these surface regions
Notice each nerve path