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Sense organs 387

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26

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11

 

 

12 24

20

27

18

 

29

 

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19

 

 

 

 

 

15

21

23

 

12

 

 

 

 

 

 

 

 

 

 

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9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

A Auricle (pinna)

11

17 16

13

17 12

18 15

10

 

 

7

 

 

6

22

25

5

 

 

14

 

 

B Auricle with apex

11

15

3

2

4

9

C External acoustic meatus

D Auricular cartilage frontal view

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388

Sense organs

 

 

 

 

 

 

1 Isthmus of auricular cartilage. Isthmus car-

19 M. antitragicus. Muscle fibers

on the anti-

1

 

 

 

tilaginis auricularis. Narrow bridge of cartilage

 

tragus. They extend partly to the tail of the

 

 

 

connecting the cartilage of the external acoustic

 

helix. B

 

 

2

 

 

meatus and tragic lamina with the auricular

20 M. transversus auricularis. Muscle located on

 

 

 

cartilage. A

 

the posterior surface of the auricular cartilage.

 

 

2 Terminal notch. Incisura terminalis auricularis.

 

3

 

 

It extends between the eminences of the sca-

 

 

Deep notch separating the lamina tragi from the

 

phoid fossa and concha. C

 

 

 

 

 

 

 

 

 

auricular cartilage. A

21 M. obliquus auricularis. It lies between the

4

 

 

3

Fissura antitragohelicina. Deep fissure sepa-

 

eminences of the concha and triangular fossa. C

 

 

 

rating the antitragus and helix inferiorly as well

22 [M. incisurae helicis]. Muscle fibers occasion-

5

 

 

as the anthelix and helix further superiorly. A

 

 

 

ally present in the caudal continuation of trans-

 

 

4 Transverse sulcus of anthelix. [[Sulcus antheli-

 

versus auricularis muscle. C

 

 

 

 

 

6

 

 

cis transversus]]. Posteromedial depression vis-

23

OLFACTORY ORGAN. Organum olfactorium (ol-

 

 

ible between the eminences of the triangular

 

 

 

 

factus). Organ of smell.

 

 

 

 

fossa and concha. A

 

 

7

 

 

24 Nasal mucosa of the olfactory region. Regio

5

Groove of crus of helix. Sulcus cruris helicis.

 

 

 

Shallow furrow on the posterior surface of the

 

olfactoria tunicae mucosae nasi. This region,

 

 

 

 

which is covered by olfactory epithelium, is

8

 

 

auricular cartilage. It corresponds to the crus of

 

 

 

 

about the size of a

nickel and

occupies the

 

 

 

the helix on the anterior surface. A

 

lateral and medial walls and roof (below the cri-

 

 

6 Fossa of anthelix. Fossa anthelicis. Furrow on

 

9

 

 

briform plate) of the nasal cavity at the level of

 

 

posterior surface of auricular cartilage corre-

 

the superior nasal concha. E F

 

 

 

 

 

 

 

 

 

sponding to the anthelix on the anterior sur-

25 Olfactory glands (of Bowman). Glandulae ol-

10

 

 

 

 

face. A

 

 

 

factoriae. Serous glands found below the ol-

 

7

Eminence of concha. Eminentia conchae.

 

 

 

factory epithelium. Their predominantly serous

11

 

 

Elevation on the posterior surface of the auricu-

 

secretions can enhance or wash away odorous

 

 

 

lar cartilage corresponding to the cavity of the

 

substances. F

 

 

 

 

 

concha. A

26

GUSTATORY ORGAN.

Organum

gustatorium

12

 

 

 

8 Eminence of scaphoid fossa. Eminentia

 

 

 

(Gustus). Organ of taste, comprised of all the

 

 

 

scaphae. Curved elevation on the posterior sur-

 

taste buds.

 

 

13

 

 

 

 

 

 

 

face of the auricular cartilage corresponding to

27 Taste bud. Caliculus gustatorius (gemma gusta-

 

 

 

the scaphoid fossa on the anterior surface. A

 

 

 

 

toria). Occupying the full thickness of the

 

9

Eminence of triangular fossa. Eminentia fossae

 

14

 

epithelium, it consists of supporting cells and

 

 

 

triangularis. Elevation on the posterior surface

 

taste cells. Each of the taste cells has microvilli

 

 

 

of the auricular cartilage corresponding to the

 

on its surface which serve as chemoreceptors.

15

 

 

 

 

 

triangular fossa. A

 

Distribution of taste buds: aggregated in the

 

10

Auricular ligaments. Ligg. auricularia. Liga-

 

epithelium of vallate (circumvallate) and foliate

16

 

 

ments of the pinna. They attach the auricular

 

papillae; solitary on the outside of the tongue. D

 

 

 

cartilage to the temporal bone.

28 Taste pore. Porus gustatorius. Space left by the

 

 

 

17

11

Anterior auricular ligament. Lig. auriculare an-

 

epithelium above the apex of the taste bud. Mi-

 

crovilli project into it. D

 

 

 

 

terius. It extends from the root of the zygomatic

 

 

 

 

 

arch to the spine of the helix. B

 

 

 

 

1812 Superior auricular ligament. Lig. auriculare superius. It passes from the upper margin of the

19osseous external auditory meatus to the spine of the helix. B

2013 Posterior auricular ligament. Lig. auriculare posterius. It extends from the eminence of the concha to the mastoid process. C

2114 Mm. auriculares. Muscles of the pinna.

15 M. helicis major. It passes upward from the

22spine of the helix to the helix. B

16 M. helicis minor. It lies on the crus of the helix.

23 B

17 M. tragicus. It lies vertically on the lamina tragi.

24 B

18 M. pyramidalis auricularis. Muscle fibers that

25occasionally split off from the tragicus muscle and pass to the spine of the helix. B

Sense organs 389

1

9

8

4

5

 

7

 

5

2

1

A Auricular cartilage, medial view

21

13

C Auricular cartilage, medial view

 

15

2

 

 

 

16

3

6

 

 

12

 

 

4

3

 

 

 

 

11

 

 

 

 

 

 

 

 

18

 

5

 

 

 

 

17

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

19

 

 

 

 

 

 

 

 

 

 

B Auricular cartilage, lateral view

 

 

 

8

 

 

 

 

 

 

 

9

28

10

11

20

12

 

 

 

 

 

22

13

 

14

15

16

D Taste bud

17

18

19

24

20

25

 

 

 

 

 

21

 

 

 

 

 

 

 

 

 

 

 

22

 

 

 

 

 

23

 

 

 

 

 

24

 

 

25

 

 

Olfactory region

F Olfactory mucosa

 

 

E

 

25

 

 

 

 

 

 

 

 

 

 

 

390 Skin and its appendages

1

 

1

SKIN (INTEGUMENT). Integumentum com-

16

Papillary layer. Stratum papillare. The delicate

 

 

 

mune. Common integument (skin). The outer

 

upper layer of the dermis with numerous con-

 

 

 

 

covering of the body consisting of three layers,

 

nective tissue papillae connecting it to the

2

 

 

 

the epidermis, dermis (corium) and subcutis. In

 

epidermis. A

 

 

 

 

 

 

the adult it covers an area of about 1.8 square

17

Papillae. Conical extensions of connective tissue

3

 

 

 

meters.

 

 

 

 

 

 

 

projecting into the epidermis. They may form

 

2

Cutis. Collective term for epidermis and der-

 

rows (dermal ridges) or branches and vary

4

 

 

 

mis.

 

 

 

 

 

 

 

18

markedly in form and organization. A E

 

 

3

Sulci of skin. Sulci cutis. Variably sized depres-

Reticular layer. Stratum reticulare. Part of der-

 

 

 

 

sions or furrows on the surface of the skin, e. g.,

 

mis adjoining the papillary layer. It consists of

5

 

 

 

the nasolabial sulcus,

the deep sulci of

the

 

more compact, densely interwoven connective

 

 

 

joints, the fine depressions on the smooth areas

 

tissue. A

 

 

 

 

 

 

 

 

 

 

 

 

 

of the skin, and the dermal ridges on the palms

19

Subcutaneous tissue. Tela subcutanea. Layer of

6

 

 

 

and soles. A

 

 

 

 

 

 

subcutaneous fatty tissue compartmentalized

 

 

 

4 Dermal ridges. Cristae cutis. Ridges produced

 

by fibrous tracts and firmly connected with the

7

 

 

 

by the underlying papillae of the corium on the

 

corium with mobile connections to the fascia. A

 

 

 

thick skin of the palms of the hands and soles of

20

Panniculus adiposus. The thicker layer of fat in

 

 

 

 

8

 

 

 

the feet. A

 

 

 

 

 

 

 

the subcutaneous tissue. A

 

 

5

Retinacula cutis. Bands of connective tissue

21

Terminal nerve corpuscles. Corpuscula nervosa

 

 

 

 

which attach the skin to the underlying tissue.

 

terminalia. Collective term for encapsulated

9

 

 

 

A

 

 

 

 

 

 

 

 

nerve endings.

 

 

 

 

6

Tactile elevations. Toruli tactiles. Skin regions

22

End bulbs of Krause (bulboid corpuscles).

10

 

 

 

with more abundant fat deposits, e. g., near the

 

Corpuscula bulboidea. Oval convolutions of

 

 

 

phalanges, thenar and hypothenar eminences.

 

nerve fibers found especially in the lamina pro-

 

 

 

 

B

 

 

 

 

 

 

 

 

pria of the mucosa. They are considered to be

11

 

7

Coccygeal foveola. [Foveola coccygea]. Pit

 

cold receptors. E

 

 

 

 

 

 

above the coccyx caused by the caudal reti-

23

Lamellated [[Vater-Pacini, pacinian]] cor-

12

 

 

 

naculum. C

 

 

 

 

 

 

puscles. Corpuscula lamellosa. Oval bodies, 2−

 

8

Caudal

retinaculum.

Retinaculum

caudale.

 

3 mm long, with concentric layers of connective

 

 

 

 

 

 

 

Connective tissue remains of the embryonic

 

tissue surrounding an inner core (axon and

13

 

 

 

notochord lying between the coccygeal foveola

 

Schwann cells). They are pressure receptors

 

 

 

 

and the coccyx. C

 

 

 

 

 

 

found in the subcutaneous fat muscles and

14

 

9

Epidermis.

Stratified,

keratinized

squamous

 

viscera. A

 

 

 

24

Tactile

[[Meissner’s]] corpuscles. Corpuscula

 

 

 

 

epithelium covering the body. Its thickness var-

15

 

 

 

ies from 30 µm to 4 mm or more. A

 

 

 

tactus. These encapsulated sensory organs in the

 

10

Stratum corneum. Most superficial, cornified

 

connective papilla of the dermis measure about

 

 

 

 

(keratinized) layer of the epidermis which un-

 

0.1 mm in length and consist of transversely

 

 

 

 

 

oriented tactile cells within a ramified nerve

16

 

 

 

dergoes continual desquamation. A

 

 

 

 

 

 

 

 

 

network. A

 

 

 

11

Stratum

lucidum.

Located

between

the

 

 

 

 

 

25

Genital corpuscles. [[Corpuscula genitalia]]. El-

17

 

 

 

stratum granulosum and stratum corneum. It is

 

 

 

 

liptical, encapsulated nerve endings similar to

 

 

 

a homogeneous, strongly refractile layer rich in

 

 

 

 

 

 

the end bulbs of Krause and found abundantly in

 

 

 

 

eleidin fibers. A

 

 

 

 

 

 

18

 

 

 

 

 

 

 

 

 

the clitoris, glans and nipple. E

 

 

12

Stratum granulosum. It consists of 1−5

cell

 

 

 

26

Tactile

menisci

[[Merkel’s discs or cor-

 

 

 

 

layers

with degenerative nuclear changes. It

 

 

 

 

 

puscles]]. Menisci tractus. Flat group of light

19

 

 

 

contains

stongly

refractory

keratohyaline

 

 

 

 

 

cells with intracellular neurofibrils. They occupy

 

 

 

granules. A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the epithelium. D

 

 

 

 

 

13 Stratum spinosum. Prickle cell layer. It consists

 

 

 

20

 

 

27

Articular corpuscles. [[Corpuscula

articu-

 

 

 

of polygonal cells

with spinous

processes

 

 

 

 

laria]]. Modified

pacinian corpuscles

within

 

 

 

 

which project from their surfaces and contact

 

 

 

 

 

 

joint capsules.

 

 

21

 

 

 

each other by means of a desmosome. They ap-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pear to bridge over relatively large intercellular

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

spaces (shrinkage artifact). A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

 

14

Stratum basale [cylindricum]. Deepest, cylin-

 

 

 

 

 

 

 

 

 

drical cell layer of the epidermis. Cell prolifera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

 

 

 

tion occurs here and in the stratum spinosum,

 

 

 

 

 

 

 

 

 

thus ensuring the continual renewal of the

 

 

 

 

 

24

 

 

 

epidermis. A

 

 

 

 

 

 

 

 

 

 

 

15

Dermis (corium). The layer of skin consisting of

 

 

 

 

 

 

 

 

 

an intimate network of collagenous and elastic

 

 

 

 

 

25

 

 

 

fibers rich in nerves and blood vessels and

 

 

 

 

 

 

 

 

 

devoid of fat. A

 

 

 

 

 

 

 

 

 

 

Skin and its appendages 391

 

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3

 

 

4

 

 

 

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13

 

 

 

14

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24

17

 

 

 

 

16

 

17

 

 

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18

23

23

5

19;20

 

6

7

8

B Tactile elevation C Coccygeal dimple

26

26

D Tactile discs (tactile menisci)

17

22

5

25

A

Skin and subcutaneous layer

E

Corpuscular nerve endings

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