--- title: "Development of the Tongue" description: "Understand the embryological development of the tongue - ideal for medical students and ENT residents." source: "The ENT Resident" canonical_url: "https://www.theentresident.com/ent-notes-lectures/development-of-tongue" categories: ["Oral Cavity and Salivary Glands"] video: "https://www.youtube.com/watch?v=zbRmnVoeP3g" image: "https://media.theentresident.com/og-images/development-of-tongue.png" --- # Development of the Tongue Understand the embryological development of the tongue - ideal for medical students and ENT residents. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=zbRmnVoeP3g The tongue begins development **around the 4th week of intrauterine life**. Development can be studied under 3 components: 1. **Mucous membrane** 2. **Muscles** 3. **Fibrous stroma** --- ### 🌱 Origin of the Mucous Membrane - It develops from the **endoderm of the floor of the primitive pharynx**. - Divided into two regions: - **Anterior two-thirds** - **Posterior one-third** These regions have **different embryological origins**. ### 🧱 Role of Pharyngeal Arches During the 4th week, six mesodermal **pharyngeal (branchial) arches** form. >Mnemonic to Remember Layers from Outside In: **CAP**: **C**: Pharyngeal *Cleft* – ectoderm **A**: Pharyngeal *Arch* – mesoderm **P**: Pharyngeal *Pouch* – endoderm --- ### 👅 Development of Anterior Two-Third of the Tongue Develops from the **first pharyngeal arch**, from: - **Two lingual swellings** (paired) - **Tuberculum impar** (unpaired midline swelling) These swellings: - Merge in the midline - Form the **anterior two-thirds** - Are separated from the floor of the mouth by the **alveololingual groove** **🔹 Foramen Cecum and Thyroglossal Duct** - A depression called the **foramen caecum** forms behind the tuberculum impar. - It's a remnant of the **thyroglossal duct**, which gives rise to the **thyroid gland**. --- ### 👅 Development of Posterior One-Third of the Tongue Develops from **second, third, and fourth arches** via: - A **median swelling** called the **hypobranchial eminence** - Divided into: - **Cranial part** (mostly from the 3rd arch) - **Caudal part** (from 4th arch) **🧩 Key Features:** - The cranial part grows forward, fusing with anterior tongue. - The line of fusion is the **sulcus terminalis**. - The caudal part forms the **epiglottis**. --- ### 📌 Summary of Development | Tongue Region | Structure Involved | Pharyngeal Arch | Outcome | | --- | --- | --- | --- | | Anterior 2/3 | Lingual swellings + Tuberculum impar | 1st arch | Mucosa of anterior tongue | | Posterior 1/3 | Cranial hypobranchial eminence | 3rd arch | Mucosa of posterior tongue | | Epiglottis + Valeculae | Caudal hypobranchial eminence | 4th arch | Epiglottis, valleculae area | --- ### 🔌 Nerve Supply of Tongue and Its Developmental Basis The **nerve supply of the tongue** reflects its embryological origin. **🔹 Anterior Two-Third** - General sensation: **Lingual nerve** (branch of V3 – 1st arch, post-trematic) - Taste sensation: **Chorda tympani** (branch of facial nerve – 1st arch, pre-trematic) **🔹 Posterior One-Third** - General & taste sensation: **Glossopharyngeal nerve (CN IX)** - Nerve of the **3rd arch** **🔹 Epiglottis and Valleculae** - Supplied by **internal laryngeal nerve** (branch of superior laryngeal nerve, from vagus) - Nerve of the **4th arch** --- ## About This Note This note on Development of the Tongue is one of the free ENT study notes published by The ENT Resident. It is free to read on the website, and it is paired with a full video lecture on YouTube. This note is categorized under [Oral Cavity and Salivary Glands](https://www.theentresident.com/ent-notes-lectures/category/oral-cavity-and-salivary-glands.md). The category page lists all the free ENT notes on that topic. Canonical page of this note: https://www.theentresident.com/ent-notes-lectures/development-of-tongue When citing or referencing this content, please credit The ENT Resident and link to the canonical page above. ## About The ENT Resident The ENT Resident is a free library of ENT notes and video lectures created by Dr. Mausumi Das (MS ENT), the ENT doctor and educator behind The ENT Resident YouTube channel (https://www.youtube.com/c/TheENTResident). These notes are written for ENT residents, ENT postgraduates preparing for exams, and MBBS students, to help them learn ENT clearly and score well. Browse all ENT notes and lectures on The ENT Resident: https://www.theentresident.com/ent-notes-lectures.md ## Premium ENT Notes Alongside these free notes, The ENT Resident also offers Premium ENT Notes. This is a paid collection of 250+ detailed, high-yield ENT notes that cover the full ENT syllabus, including topics across Otology, Audiology, Rhinology, Larynx and Trachea, Pharynx, Oral Cavity and Salivary Glands, Neck, Thyroid, ENT Surgeries, and Recent Advances in ENT. The Premium ENT Notes are written for ENT residents, ENT postgraduates, and MBBS students who want one consistent resource for both theory and practical exam preparation. They include high-yield difference tables, replicable exam diagrams, step-by-step surgical guides, mnemonics, and clinical pearls. Buying once gives you immediate access to the complete set, plus all newly added and updated notes during your access period. The access period depends on the plan you choose, and it is stated clearly at the time of purchase. After purchase, you get access to the premium notes platform, where you can read all the notes online and download them for offline access. Purchase options: - Buy the note for this topic, Development of the Tongue: https://theentresident.gumroad.com/l/rnbbjt - Buy Complete Notes on Anatomy & Embryology of Tongue: https://theentresident.gumroad.com/l/shjba - Buy all premium ENT notes (international students): https://theentresident.gumroad.com/l/ENTResidentNotes - Buy all premium ENT notes (Indian students): https://dub.sh/ent-residency-notes Preview a full sample note from the Premium ENT Notes, in the "Preview a Full Sample Note" section of this page: https://www.theentresident.com/premium.md Read what ENT residents and students say about The ENT Resident: https://www.theentresident.com/testimonials.md ## Contact To contact The ENT Resident or inquire about the Premium ENT Notes, email theentresident@gmail.com, or message on WhatsApp at +91 82402 14763 (https://wa.me/918240214763). Other contact options are on the contact page: https://www.theentresident.com/contact.md ## Related ENT Notes & Lectures #### Oral Cavity and Salivary Glands - [Adenoid Cystic Carcinoma](https://www.theentresident.com/ent-notes-lectures/adenoid-cystic-carcinoma-histology-treatment.md) - [Anatomy of Parotid Gland](https://www.theentresident.com/ent-notes-lectures/parotid-gland-anatomy.md) - [Anatomy of Submandibular and Sublingual Glands](https://www.theentresident.com/ent-notes-lectures/submandibular-sublingual-gland-anatomy.md) - [Anatomy of the Tongue](https://www.theentresident.com/ent-notes-lectures/tongue-anatomy.md) - [Benign Salivary Gland Tumors](https://www.theentresident.com/ent-notes-lectures/benign-salivary-gland-tumors.md) - [Developmental Anomalies of the Tongue](https://www.theentresident.com/ent-notes-lectures/developmental-anomalies-of-tongue.md) - [Lymphatic Drainage of Tongue](https://www.theentresident.com/ent-notes-lectures/lymphatic-drainage-tongue.md) - [Malignant Salivary Gland Tumors](https://www.theentresident.com/ent-notes-lectures/malignant-salivary-gland-tumors.md) - [Mucoepidermoid Carcinoma](https://www.theentresident.com/ent-notes-lectures/mucoepidermoid-carcinoma-histology-treatment.md) - [Muscles of Tongue](https://www.theentresident.com/ent-notes-lectures/muscles-of-tongue.md) - [Nerve Supply of Tongue](https://www.theentresident.com/ent-notes-lectures/nerve-supply-tongue.md) - [Pleomorphic Adenoma](https://www.theentresident.com/ent-notes-lectures/pleomorphic-adenoma-histology-treatment.md) - [Relations of Hyoglossus Muscle](https://www.theentresident.com/ent-notes-lectures/hyoglossus-muscle-relations.md) - [Warthin Tumor](https://www.theentresident.com/ent-notes-lectures/warthin-tumor-histology-treatment.md) --- Complete index of all pages on this site, with descriptions and markdown links: https://www.theentresident.com/llms.txt