Digestive Apparatus

Question 1

Bloodsupply to the Tongue?

Answer 1

The Tongue is supplied by the:

1. A. Lingualis (runs with styloid bone)
   ca+su: ex A.CAROTIS EXTERNA
   Eq+ru: ex. TRUNCUS LINGUOFACIALIS
   Giving of: A.Lingua Profunda –> Apex
2. A. Sublingualis
   Ru+Su: Ex A.LINGUALIS
   Eq+Ca: Ex. A.SUBMENTALIS ex A. FACIALIS
3. V. Lingualis
   Ex: TRUNCUS LINGUOFACIALIS
4. V. Sublingualis
   Ca,Su,Ru: Ex. V.LINGUALIS
   Eq: ex V.LINGUOFACIALIS

Question 2

Innervation of the Tongue

Answer 2

1. N.Mandibularis V3 (of Trigeminus (V))
   - N.Lingualis –> N.Sublingualis
   - S
   - sps
   - 2/3 rostral
2. N.Facialis (VII)
   - Chorda tympani
   - Parasymp
   - s
   - Whole tongue, chemoR + mechanoR, Taste Buds
3. N. Glossopharyngeus (IX)
   - nn.lingualis
   - Sensory
   - 1/3 caudal
4. N.Vagus (X)
   - sensory
   - root
5. N.Hypoglossus (XII)
   - M
   - Tongue muscles

Question 3

Papilla Linguae

Answer 3

MECHANICAL: cornfield, licking, protects deep struct)

• Filiform: smallest, dorsal surf
• Conical (fe: dorsal superficial, ox: basis of tongue)
• Marginal (newborn car and piglets:sucling)

GUSTATORY: taste and tastebuds

• Fungiform: all dorsal surf
• Vallate: at dorsal root (ca=22, Eq=21, ru=2*10-15)
• Foliate: lateral, NOT ru+ca

+ Lentiforme papilla in ru!

Question 4

Intersp. diff Tongue

Ca

Answer 4

Sulcus medians

Lyssa

Question 5

Intersp. diff Tongue

Su

Answer 5

NOT sulcus

Valate papilla

Question 6

Intersp. diff Tongue

Ru

Answer 6

Torus Linguae

Fossa Linguae

Question 7

Intersp. diff Tongue

EQ

Answer 7

Dorsum linguae + Cartillage

Question 8

Interspecial differences MANDIBULA

For.Mentale

Answer 8

Eq= 1
Bo= 1
Ca+Su= FORAMINA MENTALIA

Question 9

Interspecial differences MANDIBULA

Inc.Vasorum Facilium

Answer 9

EQ ONLY

Question 10

Interspecial differences MANDIBULA

Proc.Angularis

Answer 10

CA ONLY

Question 11

Interspecial differences MANDIBULA

Tuberositas M.Sternomandibularis

Answer 11

EQ ONLY

Question 12

Articulatio Temporo mandibularis

Answer 12

TYPE: Duplex, Condylaris (biaxial)

INCONGRUENCY: Ca and Fe, joint is almost CONGRUENT.

Discus articularis (No annulus fibrosus)
Membrana synovialis (dorsalis et ventralis)

Outer fibrous layer is stranghtened by:
- Lig.laterale
- Lig. Caudale (eq)
(not present in ca and su?)

Question 13

Hyoid Scelleton is attached to suspensory apparatus

Answer 13

Ca= Proc.Mastoideus
Eq+Ru= Proc. Styloideus
Su= Proc. Nuchalis

Question 14

Hyoid skelleton consist of

Answer 14

Stylohyoid
Epihyoid
Ceratohyoid 
Basihyoid
- Proc. Lingualis (eq and ru)
Thyrohyoid

Question 15

What is the function of the HYOID APPARATUS?

Answer 15

It acts as a suspensory mechanism for the Tongue and Larynx.

Question 16

Interspecial differences of Masticatory muscles

Answer 16

M.Digastricus

- EQ: 2 parts, rostral and caudal