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NEET MDS General Anatomy, Histology, Embryology And Dental Anatomy Flashcards
52 question-and-answer cards covering General Anatomy, Histology, Embryology And Dental Anatomy as it is examined in NEET MDS. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the General Anatomy, Histology, Embryology And Dental Anatomy deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
Define dead tracts and interglobular dentin.
Dead tracts are groups of empty dentinal tubules (odontoblast processes have degenerated), appearing dark in transmitted light. Interglobular dentin is poorly mineralized dentin where calcospherites failed to fuse, found mainly in the crown beneath the mantle dentin.
Name the four histological zones of the dental pulp from the dentin inward.
Odontoblastic layer, cell-free zone (of Weil), cell-rich zone, and the pulp core (central pulp containing vessels and nerves).
What are the four functions of the dental pulp?
Formative (forms dentin via odontoblasts), nutritive (supplies nutrients to dentin), sensory/protective (mediates pain), and defensive/reparative (forms tertiary dentin and inflammatory response).
What is cementum's composition, what cells form it, and what fibers anchor in it?
Cementum is about 50% inorganic and 50% organic/water; it is formed by cementoblasts. Sharpey's fibers (embedded ends of periodontal ligament collagen fibers) anchor the tooth to the alveolar bone via cementum.
Differentiate acellular and cellular cementum by location and function.
Acellular (primary) cementum covers the cervical two-thirds of the root, lacks cementocytes, and is the main anchoring cementum. Cellular (secondary) cementum covers the apical third and furcations, contains cementocytes, forms faster, and adapts to functional demands and continued eruption.
Name the five principal fiber groups of the periodontal ligament.
Alveolar crest group, horizontal group, oblique group (the most numerous, resisting masticatory forces), apical group, and interradicular group (in multirooted teeth).
List the main functions of the periodontal ligament.
Supportive/anchorage, sensory (proprioception and pain), nutritive (supplies cementum, bone, gingiva), formative and remodeling (cementoblasts, osteoblasts, fibroblasts), and resorptive functions (osteoclasts, cementoclasts).
Distinguish keratinized (masticatory), non-keratinized (lining), and specialized oral mucosa with examples of each.
Masticatory mucosa is keratinized and found on the gingiva and hard palate. Lining mucosa is non-keratinized and found on the cheeks, lips, floor of mouth, ventral tongue, and soft palate. Specialized mucosa covers the dorsum of the tongue (bearing papillae and taste buds).
Name the four types of lingual papillae and indicate which bear taste buds.
Filiform (no taste buds; mechanical), fungiform (taste buds), circumvallate/vallate (many taste buds, arranged in a V anterior to the sulcus terminalis), and foliate (taste buds, on lateral tongue).
Name the three major paired salivary glands, their duct names, and their secretion type.
Parotid (Stensen's duct; purely serous), submandibular (Wharton's duct; mixed, mainly serous), and sublingual (ducts of Rivinus/Bartholin's duct; mixed, mainly mucous).
From which embryonic processes does the face develop, and what does each contribute?
The frontonasal prominence (forehead, nose dorsum, medial/lateral nasal processes), paired maxillary prominences (cheeks, lateral upper lip, secondary palate), and paired mandibular prominences (lower lip and jaw). The medial nasal processes fuse to form the intermaxillary segment (philtrum, primary palate, four incisors).
How does the secondary palate form, and what is the timing of palatal shelf fusion?
The secondary palate forms from the bilateral palatal shelves of the maxillary processes, which initially grow downward beside the tongue, then elevate to a horizontal position and fuse with each other, the nasal septum, and the primary palate. Fusion occurs around the 8th-12th weeks of intrauterine life.
What is the embryological basis of a cleft lip versus a cleft palate?
Cleft lip results from failure of fusion of the maxillary prominence with the medial nasal process (intermaxillary segment). Cleft palate results from failure of fusion of the palatal shelves with each other and/or with the nasal septum/primary palate.
From which two embryonic tissues does the tooth germ develop, and what are its three components?
It develops from oral ectoderm (dental lamina) and the underlying ectomesenchyme (neural crest-derived). Its three components are the enamel organ (ectoderm), the dental papilla, and the dental follicle (sac) (both ectomesenchyme).
List the stages of tooth development (odontogenesis) in order.
Initiation (dental lamina), bud stage, cap stage, bell stage (early and late/advanced), followed by apposition and maturation (crown formation), and then root formation.
Name the four cell layers of the enamel organ in the bell stage and the role of each.
Outer enamel epithelium (protective), stellate reticulum (cushioning, nutrient reservoir), stratum intermedium (supports ameloblasts/enamel formation), and inner enamel epithelium (differentiates into ameloblasts that form enamel).
What derivatives form from the dental papilla and the dental follicle?
The dental papilla forms the dentin (odontoblasts) and the dental pulp. The dental follicle (sac) forms the cementum (cementoblasts), the periodontal ligament, and the alveolar bone.
What is Hertwig's epithelial root sheath, and what are the epithelial cell rests of Malassez?
Hertwig's epithelial root sheath is the apical extension of the inner and outer enamel epithelium that determines the shape and number of roots and induces root dentin formation. After it fragments, the remnants persist in the periodontal ligament as the epithelial cell rests of Malassez.
State the eruption (and shedding/exfoliation) sequence and approximate eruption timing of the primary dentition.
Eruption order: central incisor (6-10 mo), lateral incisor (10-16 mo), first molar (13-19 mo), canine (16-22 mo), second molar (25-33 mo). The full primary dentition (20 teeth) is usually complete by about 2.5-3 years, and shedding occurs from about 6 to 12 years.
Give the approximate eruption ages of the permanent first molar, central incisor, and third molar.
Permanent first molar: about 6 years. Permanent central incisor: about 6-7 years (mandibular slightly before maxillary). Third molar: about 17-21 years.
Which permanent tooth is the largest, which is the longest, and which is generally the most common congenitally missing tooth (excluding third molars)?
The maxillary first molar is the largest; the maxillary canine is the longest tooth. The mandibular second premolar is the most commonly congenitally missing tooth (after third molars), followed by the maxillary lateral incisor.
Compare the FDI two-digit, Universal, and Palmer tooth numbering systems with how a permanent maxillary right central incisor is designated in each.
FDI (two-digit, first digit = quadrant, second = tooth): tooth 11. Universal (1-32 starting at maxillary right third molar): tooth 8. Palmer (quadrant grid symbol with tooth number 1-8): the central incisor (1) in the upper-right grid bracket.
Define the curve of Spee and the curve of Wilson.
The curve of Spee is the anteroposterior curve of the occlusal plane (concave for the mandible) following the buccal cusp tips from canine to last molar. The curve of Wilson is the mediolateral (transverse) curve formed by the inclination of the molar cusps, concave upward when viewed from the front.
Describe Angle's classification of malocclusion based on first molar relationship.
Class I: mesiobuccal cusp of the maxillary first molar occludes in the mesiobuccal groove of the mandibular first molar (normal molar relation). Class II: mandibular molar is distal to that position (overjet/retrognathic). Class III: mandibular molar is mesial to that position (prognathic/underbite).
What this deck covers
This deck covers the General Anatomy, Histology, Embryology And Dental Anatomy portion of the NEET MDS syllabus in question-and-answer form. Browse the full NEET MDS syllabus to see how it fits with the rest.
Answers are written to be recallable, not just readable — averaging about 233 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
General Anatomy, Histology, Embryology And Dental Anatomy flashcards FAQ
How many General Anatomy, Histology, Embryology And Dental Anatomy flashcards are in this NEET MDS deck?
52 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these NEET MDS flashcards free?
Yes. The preview here is free to read with no signup, and the full 52-card deck is free inside the Examius app.
What do the General Anatomy, Histology, Embryology And Dental Anatomy cards cover?
They follow the General Anatomy, Histology, Embryology And Dental Anatomy portion of the NEET MDS syllabus, in question-and-answer form.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.