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Anatomy 3 oral > C1 - Oral cavity and its features > Flashcards

C1 - Oral cavity and its features Flashcards

1
Q

Oral cavity

Structures to mention in the oral cavity

A
  • Vestibulum oris (Space between the teeth and lips and cheeks)
  • Rima oris (Slit between lips, mouth opening)
  • Labia oris (Lips)
  • Labium suerius/maxillare (Upper lip)
  • Philtrum (Median groove from the nasal septum to the upper lip)
  • Labium inferius/mandibulare (Lower lip)
  • Angulus oris
  • Bucca (Cheek)
  • Cavum oris proprium (Cavity enclosed by the teeth and limited caudally by the arcus palatoglossus)
  • Palatum durum (Hard palate, supported by bone)
  • Palatum molle [Velum palatinum] (Soft palate, caudal part of the palate)
  • Raphe palati (Median line of junction of the halves of the palate)
  • Recessus sublingualis lateralis (Space under the tongue, between the frenulum linguae and the mandible)
  • Gingiva (Gum, mucous membrane attached to the teeth and alveolar bone)
  • Caruncula sublingualis (Flattened projection rostrolateral to the frenulum linguae, ductus mandibularis and ductus sublingualis major opens there)
  • Plica sublingualis (Fold of mucous membrane on the floor of the mouth lateral to the frenulum linguae, ends in carucula sublingualis)
  • Papilla parotidea (Small elevation of the buccal mucosa at the orifice of the ductus partoideus opposite the upper fourth premolar)
  • Papilla zygomatica (ca) (Short fold of buccal mucosa extending caudally form the papilla partoidea and bearing the orifices of the ductus glandulae zygomaticae opposite the upper molars)
  • Rugae palatinae (Transvers ridges of the mucosa on the hard palate)
  • Pulvinus dentalis (Dental pad)
  • Papilla incisiva (Elevation of mucous membrane at the rostral end of the raphe palati)
  • Plica pterygomandibularis (Dorsoventral fold of mucous membrane between the palate and the mandible behind the last molars)
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2
Q

Oral cavity

Interspecies differences

A
  • Papilla zygomatica (ca)
  • Gl. buccalis medius (ru)
  • Gl. buccalis dorsalis:
    • ​Car: medial to arcus zygomaticus, called gl. zygomaticus
  • Fossa tonsillaris (car)
  • Eq: hard palate contains venous plexus
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3
Q

Oral cavity

Give the osseus support of the oral cavity

A
  • Os palatina (lamina horizontalis)
  • Os incisiva
  • Os maxilla (palatine & processus alveolaris)
  • Mandibula
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4
Q

Oral cavity

Give the borders of the oral cavity

A
  • Rostral: lips
  • Lateral: cheeks
  • Roof: hard palate
  • Ventral: tongue
  • Floor: suprahyal muscles
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5
Q

Oral cavity

Cavum oris proprium

A
  • Vestibulum and cavum oris proprium communicate via:
    • Interdental space (diastema: space between incisors and cheek teeth)
    • Space behind the last molars
  • Enclosed by the teeth
  • Caudal border: arcus palatoglossus
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6
Q

Oral cavity

Labia oris

A
  • Upper lip
    • ​Ca, su: smaller
    • Eq, ru: presents the chin
  • Lower lip
  • Labial glands:
    • ​In submucosa
    • Well developed near angulus oris
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7
Q

Oral cavity

Philtrum

A
  • Median cleft from septum nasi → upper lip
  • Car, small ru: divides the upper lip
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8
Q

Oral cavity

Rima oris

A
  • Oral cleft = rima oris
  • Entrance to the oral cavity
  • Bounded by the edges of the upper and lower lips
  • Unite on each side at the angulus oris
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9
Q

Oral cavity

  1. Cheeks (buccae)
  2. Buccal glands
A
  • Forms the lateral wall of the vestibulum
  • Attached to margo alveolaris of the mandible and maxilla in the region of the cheek teeth
  • Its caudal portion contains m. masseter

Buccal glands:

  • Gl. buccalis dorsalis
    • ​Car: medial to arcus zygomaticus, called gl. zygomaticus
  • Gl. buccalis ventralis
  • Gl. buccalis medius (ru)
  • Their ducts opens into vestibulum oris
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10
Q

Oral cavity

Gums (gingivae)

A
  • Part of the oral mucosa
  • United to the periosteum of the procussus alveolaris of the jaws
  • Encircle the necks of the teeth - margo gingivalis
  • Papilla gingivalis (interdentalis): mucosal elevation between the teeth
  • Sulcus gingivalis: groove between gingiva and tooth

Gums in ruminants:

  • Gums are modified
  • Pulvinus dentalis:
    • ​Dental pad
    • Formed by gum
    • Takes the place of the upper incisors (in ru: takes place of the missing incisors)
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11
Q

Oral cavity

Hard palate

A
  • Roof of the oral cavity proper
  • Bounded laterally and rostrally by the upper dental arch
  • Eq: its mucosa contains venous plexus
  • Ruga palatinae:
    • ​On either side of raphe palatini
    • Ru: the crests of the ridges are studded by cornified papillae
    • Number of palatine ridges in different species:
      • Ca: 6-10 pairs
      • Su: 20-23 pairs
      • Ox: 15-20 pairs
      • Eq: 16-18 pairs
  • Papilla incisiva:
    • ​Elevation of mucous membrane at the rostral end of the raphe palatini
    • Found behind:
      • Upper incisors
      • Dental pad
    • Conceals the orifices of ductus incisivi
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12
Q

Oral cavity

Draw a cross section of hard palate

A
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13
Q

Oral cavity

Draw the maxillary part of the oral cavity

A
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14
Q

Oral cavity

Soft palate (palatum molle)

A
  • Su: rudimentary uvula
  • Muscles of the soft palate:
    • M. palatinus
      • ​O: free border of os palatinus
      • I: caudal border of soft palate
      • A: shortens the soft palate
    • M. tensor veli palatini
      • ​O: proc. muscularis of pars tympanica of os temporale
      • I: aponeurosis of soft palate
      • A: Tenses, straightens the rostral part of the soft palate
    • M. levator veli palatini
      • ​O: proc. muscularis of pars tympanica of os temporale
      • I: soft palate
      • A: raises the soft palate toward the basis cranii
  • Arcus palatoglossus:
    • ​Mucosal pillars
    • Connect the soft palate with the radix linguae
    • Forms the lateral boundaries of the isthmus faucium
  • Arcus palatopharygeus:
    • ​​Mucosal pillars
    • Connect the soft palate with the lateral wall of pharynx
    • Contain lymphoid tissue
    • Contain glandulae palatini
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15
Q

Oral cavity

Fossa tonsillaris

A
  • Car
  • Between arcus palatoglossus → arcus palatopharyngeus
  • Houses palatine tonsile
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16
Q

Oral cavity

Give the blood supply of the oral cavity

A
  • A. maxillaris
    • ​A. palatina minor
    • A. palatina major
    • A. alveolaris inferior
  • A. lingualis (ca, sus: ex a. carotis externa, eq, ru: ex tr. linguofacialis)
    • A. sublingualis (eq, ca: ex. a. submentalis, ru, sus: ex. a. lingualis)
    • A. palatina ascendens (eq: ex tr. linguofascialis, ca, sus: ex a. lingualis, ru: ex a. occipitalis)
  • A. pharyngea ascendens (eq: ex a. thyroidea cranialis, ca: ex a. carotis externa, ru: ex a. carotis communis)
  • A. facialis (eq, ru: ex tr. linguofascialis, ca, sus: ex a. carotis externa)​
    • A. labialis inferior (sus: ex. a. buccalis)
    • A. labialis superior (sus: ex. a. buccalis)
    • A. angularis oris (ca: ex a. facialis, eq: ex a. labialis inferior, ru: ex a. labialis superior)

Forenklet:

  • A. maxillaris
    • ​A. palatina minor (→ soft palate?)
    • A. palatina major (→ hard palate?)
    • A. alveolaris inferior
  • A. lingualis
    • ​A. sublingualis (ex. a. submentalis)
    • A. palatina ascendens (ex a. lingualis) (→ tonsilla palatina)
  • A. pharyngea ascendens (ca: ex a. carotis externa, eq: ex a. thyroidea cranialis)​
  • A. fascialis
    • A. labialis inferior
    • ​A. labialis superior
    • A. angularis oris
17
Q

Oral cavity

Draw the general features of the entire oral cavity

18
Q

Oral cavity

Draw cross section of isthmus faucium

19
Q

Oral cavity

Draw the mandibular part of the oral cavity

20
Q

Name the oral glands

A
  • Gll. labialis (Glands of the lips)
  • Gll. buccales (Glands of the cheeks. Opens into vestibulum oris)
    • Gl. buccales dorsales
      • Car: Gl. zygomatica (major salivary gland, medial to os zygomaticum)
    • Gl. buccales ventrales
    • Gl. buccales medi (ru)
  • Gll. palatinae (Palatine glands on the oropharyngeal side of the soft palate)
  • Gll. linguales (Lingual glands, mainly on root and margins of the tongue)
  • Gll. gustatoriae (Taste glands, whose ducts discharge into the groove of a papilla vallata)

Anatomy 3 oral (122 decks)

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