Glandular, nervous, & lymphatic systems, Embryology Flashcards
What is involved with the glandular tissue?
Lacrimal
Salivary
Thyroid
Parathyroid
Thymus glands
Structure that produces a chemical secretion necessary for normal body function
Gland
Gland that has a duct associated with it (exit sign)
Exocrine gland
A passageway that allows the secretion to be emptied directly into the location where the secretion is to be used
Duct
What gland is ductless and secretes hormones?
Endocrine gland
Paired, almond-shaped, exocrine glands that secrete lacrimal fluid (tears)
Lacrimal glands
Associated with dry eyes and mouth
Sjogren’s syndrome
Lubricates conjunctiva lining the inside of the eyelids and front of eyeball
Lacrimal glands
What are salivary glands controlled by?
Autonomic nervous system
What are salivary glands divided into?
Major
Minor
What are the major salivary glands?
o Parotid
o Submandibular
o Sublingual
o Largest major salivary gland
o Serous secretion (watery)
o 25% volume
Parotid salivary gland
What duct is associated with the parotid salivary gland?
Stensen’s duct
o Second largest major salivary gland
o Serous & mucous secretions
Slippery saliva
o 60-65% volume (#1 in saliva production)
Submandibular salivary gland
What is #1 in salivary production?
Submandibular salivary gland
What duct is associated with the submandibular salivary gland?
Wharton’s duct
What is the #1 side effect of the submandibular salivary gland?
Dry mouth
o Smallest, most diffuse, major salivary gland
o Mucous secretion
o 10% volume (least production)
Sublingual salivary gland
What duct is associated with the sublingual salivary gland?
Bartholin’s duct
o Smaller than the larger major salivary glands but are more numerous in number
o They are not individually encapsulated but surrounded by connective tissue within the submucosa
o <10% volume
o Exocrine glands
Minor salivary glands
Salivary stone
Sialolith
- Masses in salivary glands
- Painful
- May be removed surgically
Sialolith
Blood filled – purple/blue look
Ranula
Saliva filled – pink/clear
Mucocele
Dry mouth
Xerostomia
- Autoimmune disease
- Body dries out
Sjogren syndrome
Hard palate is whitened by hyperkeratinization
Nicotinic stomatitis
o Largest endocrine gland
o Secrete hormones
-Thyroxine
Thyroid gland
- Enlarged thyroid gland
- May be firm and tender
Goiter
- Underactive thyroid
- Weight gain
- Fatigue
Hypothyroidism
- Overactive thyroid
- Nervousness
- Insomnia
- Heart palpitations
Hyperthyroidism
o Consist of four small endocrine glands, two each side
o Because the glands are ductless, they produce and secrete hormones directly into the vascular system
o Not palpated or seen, too deep
Parathyroid glands
o Endocrine gland
o Makes & trains T-cells
Thymus gland
What are T-cells?
When do they form?
When do you have them by?
-Fighter cells
- Before birth
- The end of puberty
How many pairs of cranial nerves?
12
How many single cranial nerves?
24
All cranial nerves connect to the brain at the base and pass through the skull by ______
Foramina and fissures
Afferent
Sensory
Efferent
Motor
What are the types of nerves?
Afferent
Efferent
Mixed
Taking information from periphery and sending it to brain
* Smell
* Heat
Afferent nerves
Take information from brain to periphery to make a movement
Feel heat, then moves hand
Efferent nerves
Have sensory and/or motor function
Mixed nerves
What nerve is I?
Olfactory
Olfactory nerve
-Type?
-Function?
-Exits through?
-Sensory
-Smell to brain
-Through cribiform plate of ethmoid bone
What is nerve II?
Optic
Optic nerve
-Type?
-Function?
-Exits through?
-Sensory
-Sight to brain
-Through optic canal of sphenoid bone
What is nerve III?
Oculomotor
Oculomotor nerve
-Type?
-Function?
-Exits through?
-Motor
-Moves eyeball
-Through superior orbital fissure of sphenoid bone
What is nerve IV?
Trochlear
Trochlear nerve
-Type?
-Function?
-Exits through?
-Motor
-Moves eyeball
-Through superior orbital fissure of sphenoid bone
What is nerve V?
Trigeminal
-Opthalmic
-Maxillary
-Mandibular
Trigeminal nerves - OMM
-Type?
-Function?
-Exits through?
-Sensory
-Provides sensory information
-Through superior orbital fissure of sphenoid bone
What is the largest branch of the trigeminal nerve?
Mandibular branch
What is nerve VI?
Abducens
Abducens nerve
-Type?
-Function?
-Exits through?
-Motor
-Moves eyeballs
-Through superior orbital fissure of sphenoid bone
What is nerve VII?
Facial
Facial nerve
-Type?
-Function?
-Exits through?
-Mixed
-Facial expressions
-Through stylomastoid foramen of temporal bone
What is nerve VIII?
Vestibulocochlear
-Auditory
Vestibulocochlear (Auditory) Nerve
-Type?
-Function?
-Exits through?
-Sensory
-Hearing and balance
-Through external acoustic meatus
What is nerve IX?
Glossopharyngeal
Glossopharyngeal nerve
-Type?
-Function?
-Exits through?
-Mixed
-Taste, sensations from tongue
-Jugular formen
What is nerve X?
Vagus
Vagus nerve
-Type?
-Function?
-Exits through?
-Mixed
-Vomit
-Jugular formen
What is nerve XI?
Accessory
Accessory nerve
-Type?
-Function?
-Exits through?
-Motor
-Controls neck
-Jugular foramen
What is nerve XII?
Hypoglossal
Hypoglossal nerve
-Type?
-Function?
-Exits through?
-Motor
-Shape and movement of tongue
-Hypoglossal foramen
What nerves are synergistic?
Number and name
III - Oculomotor
IV - Trochlear
VI - Abducens
What five nerves do we inject in the maxillary nerve?
-Anterior superior alveolar N.
-Middle superior alveolar N.
-Posterior superior alveolar N.
-Greater palatine N.
-Nasopalatine N.
What four nerves do we inject in the mandibular nerve?
-Buccal N.
-Inferior alveolar N.
-Mental N.
-Incisive N.
Joins infraorbital nerve through infraorbital foramen
Sense & pain of maxillary central, maxillary lateral, canine, periodontium, pulp, gingiva
ASA nerve block
What teeth would an ASA on the right side block?
6, 7, and 8
What teeth would an ASA on the left side block?
9, 10, and 11
Exits through Infraorbital foramen
Sense & pain to maxillary premolar and mesiobuccal root of maxillary first molars facially
Does NOT numb entire maxillary first molar
MSA nerve block
What teeth would an MSA on the right side block?
MB root of 3, and 4+5
What teeth would an MSA on the left side block?
MB of 14, 13+12
Exits through Infraorbital foramen
Distobuccal root of maxillary 1st molar, 2nd molar, 3rd molar, tissue facially, and maxillary sinuses
PSA nerve block
Exits though Greater palatine foramen (on palatine bones)
Posterior hard palate, posterior lingual gingiva
GP nerve block
Exits through incisive foramen (8,9)
Anterior hard palate, lingual gingiva of maxillary anterior teeth, and nasal septal tissue
Innervates tissue on right and left, canines and everything forward
NP nerve block
Skin of check, buccal mucous membranes, and buccal gingiva of mandibular posterior teeth
Buccal nerve block
What teeth are affected from a left inferior alveolar nerve block?
17-24
What teeth are affected from a right inferior alveolar nerve block?
25-32
Mental foramen
Chin, lower lip, labial mucosa near mandibular anterior teeth and pm
Mental incisive nerve block
Merges with mental n. through mental foramen
Anterior mandibular teeth
Incisive nerve block
What muscles are moved by the temporal branch?
- Orbicularis oculi
- Corrugator supercilium
What muscles are moved by the buccal branches?
- Upper lip and nose
- Buccinator
- Risorius
- Orbicularis oris
What muscles are moved by the mandibular branch?
- Lower lip
- Mentalis muscle
What muscle is moved by the cervical branch?
Platysma muscle
Base of the large circumvallate lingual papillae on the posterior part of the tongue’s dorsal surface
Von Ebner salivary gland
What indicates a neoplastic growth?
Loss of mobility of the thyroid gland
Aids immune system in fighting disease
Lymphatic system
What is the lymphatic system a network of?
Lymph vessels
Nodes
Ducts
Tonsils
What does the lymph system communicate with?
Blood vessels
Where are lymphs at in teeth with an abcess?
Pulp
o More numerous than blood vessels
o Larger and thicker than capillaries
Lymph vessels
o System of channels
o Parallel venous blood vessels
o One-way flow valves
Lymph vessels
Liquid tissue
Lymph
What are lymphocytes?
Cells in lymphs
Tissue/liquid draining and passing through lymph node
Lymphs
o Bean shaped (1-2cm long)
o Filter toxic products from lymph
Lymph nodes
What are lymph nodes like in a healthy patient?
Small
Soft
Mobile
What is the drainage pattern of afferent lymph vessels?
Allows flow into nodes
What is the drainage pattern of efferent lymph vessels?
Flow out of vessels through hilus
Depressed area in middle of lymph node
Hilus
o Masses of lymphoid tissue
o Seated between anterior & posterior tonsillar pillars
o Oral cavity
o Pharynx
Tonsillar tissue
What are tonsil stones composed of?
Mucous
Snot
Bacteria
What causes bad breath?
Tonsil stones
How long does a patient with strep throat have to be on antibiotics to be treated?
24 hours
What are the five superficial lymph nodes of the head?
Occipital
Retroarticular
Anterior auricular
Superficial parotid
Facial
1-3
Bilateral
Brain occipital region
Occipital lymph nodes
1-3
Posterior to ear
Retroarticular lymph nodes
1-3
Anterior to each ear
Anterior auricular lymph nodes
1-10
Superficial to each parotid gland
Superficial parotid
1-12
Positioned along length of facial vein
Facial lymph nodes
Fever for several days, vesicular skin lesions, swollen occipital lymph nodes
Primary varicella infection
(Chicken pox)
What deep nodes can and cannot be palpated?
Can: Superior & inferior deep cervical lymph nodes
Cannot: deep lymph nodes
What are the four superficial cervical lymph nodes?
-Submental/Sublingual
-Submandibular
-External jugular
-Anterior jugular
Where are the locations of the submandibular superficial cervical lymph nodes?
-Cheeks
-Upper lip
-Body of tongue
-Anterior portion of hard palate
-Teeth except mand. incisors & max. 3rd molars
From conception to when baby is born
Embryology
What months are the first trimester?
Months 1-3
What months are the second trimester?
Months 4-6
What months are the third trimester?
Months 7-9
What week is a zygote?
Week 1
What weeks are the embryonic stage?
Weeks 2-8
When is the fetal stage?
Weeks 9-birth
When does facial development begin?
Second month of pregnancy
What are the primary germ layers? Describe them
Ectoderm - superficial
Mesoderm - Middle
Endoderm - Deepest
What is the stomodeum? When does it form?
Future mouth
Second month
Large prominence above the stomodeum
Frontonasal prominence
What does the frontonasal prominence form?
Forehead
Middle of nose
Part of the dental arch
Below the stomodeum
-First arch
-End of third week
Mandibular prominence
What does the mandibular prominence form?
Mandible
Components of the lower jaw
o Both sides of the stomodeum
o Pinch off from the mandibular arch
-Arch 1
Maxillary prominence
What does the maxillary prominence form?
Maxillary bones
Sides of the nose
Portion of the upper lip not formed by the frontonasal process
-Second arch
-Below mandibular arch
Hyoid prominence
When are the first noticeable changes in an embryo seen?
Second month
What are the future nostrils?
Nasal placodes
o Break through opening the oral/nasal cavity
o Located inferiorly to nasal placodes
Nasal pits
What is mesial to the nasal pits?
Nasomedial prominence
What does the nasomedial prominence form?
Middle of nose
Philtrum
Portion of dental arch (4 upper incisors)
Primary palate
Alae
Move from sides of head to the front by the end of development
Eyes
o Begins between the mandibular arch and the hyoid bone
o Begin low and forward before moving into position back and lateral
Ears
Large mouth
Macrostomia
Small mouth
Microstomia
Drains tears from eye to nasal cavity
Nasolacrimal duct
Where the Maxillary process joins the nasolateral prominence
Nasolacrimal groove
When does a cleft lip or palate form?
Weeks 5-6
What process’s didn’t fuse together to form a left cleft lip?
Left maxillary process
Nasiomedial process
When is it safest to treat pregnant women?
2nd trimester
What autoimmune disease is associated with xerostomia?
Sjogren’s syndrome