Medical – Anatomy System – Human Body Anatomy diagram and chart images

Anatomical Course of the Inferior Alveolar Nerve and Lingual Nerve Diagram

Inferior alveolar nerve (V3 branch) enters mandibular foramen, runs in canal supplying lower teeth, exits as mental nerve for chin/lower lip; lingual nerve (also V3) supplies anterior tongue sensation/floor of…

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Anatomy of the Nerves of the Dorsum of the Foot Superficial and Deep Fibular Nerves Diagram

Nerves of dorsum foot include superficial fibular (sensory to dorsum except first webspace), deep fibular (first webspace skin, extensor digitorum brevis), sural (lateral foot). They emerge from anterior/lateral leg compartments.

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Anatomical Course of the Common Fibular Nerve and its Terminal Branches Diagram

The common fibular (peroneal) nerve wraps around fibular neck (vulnerable to injury), divides into superficial (lateral compartment, peroneus longus/brevis) and deep (anterior compartment, tibialis anterior, extensors) branches. It supplies dorsiflexion,…

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Course of the Lacrimal Nerve Diagram

Lacrimal nerve (V1 branch) enters orbit via superior orbital fissure, runs superolateral, supplies lacrimal gland (parasympathetic hitchhike from facial via pterygopalatine ganglion), conjunctiva, upper eyelid skin. It communicates with zygomatic…

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Origin of the Blood Supply to the Upper Limb Subclavian Vessels Diagram

Origin of upper limb blood supply: subclavian artery (from brachiocephalic right, aortic arch left), continues as axillary (thoracoacromial, subscapular), brachial (profunda brachii), then radial/ulnar in forearm.

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Coronary Angiogram with Narrowing Labelled Diagram

Coronary angiograms label narrowing (stenosis) in arteries like LAD, circumflex, right coronary, often graded by percent occlusion to guide stenting or bypass decisions.

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Pretracheal Fascia Layer of the Neck Labelled Diagram

Pretracheal fascia (visceral layer) invests thyroid, trachea, esophagus, infrahyoid muscles; blends with carotid sheath laterally, buccopharyngeal fascia posteriorly. It forms visceral vascular space and invests recurrent laryngeal nerves.

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anatomical terms of location Diagram

Anatomical terms of location standardize descriptions: superior/inferior, anterior/posterior, medial/lateral, proximal/distal, superficial/deep, palmar/plantar, dorsal/ventral, etc., based on anatomical position.

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Structure of the Circle of Willis Diagram

The circle of Willis is an anastomotic arterial ring at brain base: anterior cerebral (from internal carotid), anterior communicating, internal carotid, posterior communicating (from posterior cerebral), posterior cerebral (from basilar).…

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Descent of the Testis Embryology Diagram

Descent of the testis embryologically begins near kidneys at 7-8 weeks, guided by gubernaculum through inguinal canal (transabdominal phase via genitofemoral nerve), then inguinoscrotal phase (hormone-driven, testosterone/insulin-like factor 3) into…

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Muscular Triangle of the Neck Diagram

The muscular triangle of the neck is bounded by midline, anterior digastric belly, and superior omohyoid belly, containing infrahyoid muscles (sternohyoid, sternothyroid, thyrohyoid), thyroid gland, trachea, esophagus, and common carotid…

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Regional Blood Supply to the Cerebrum Diagram

Regional blood supply to the cerebrum divides into anterior (anterior cerebral to medial surface), middle (middle cerebral to lateral surface, insula, basal ganglia), and posterior (posterior cerebral to occipital, inferior…

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The Submandibular Ganglion and Branches Diagram

The submandibular ganglion hangs from lingual nerve, receives preganglionic parasympathetics from chorda tympani (facial), postganglionic fibers supply submandibular/sublingual glands for salivation. Sensory fibers pass through without synapse.

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Posterior View of the Lower Limb Anatomical Course of the Sciatic Nerve Diagram

Posterior view of lower limb shows sciatic nerve emerging below piriformis, descending between greater trochanter and ischial tuberosity, dividing into tibial and common fibular near popliteal fossa. It supplies hamstrings…

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ASIA scale 57 Diagram

ASIA scale assesses spinal cord injury impairment: A complete (no sensory/motor below level), B sensory incomplete, C motor incomplete with >50% key muscles

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Neurulation

Neurulation forms the neural tube precursor to CNS as notochord induces overlying ectoderm to thicken into plate, then elevate neural folds that fuse dorsally starting mid-region progressing cranially and caudally,…

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Innervation of the Nasal Septum Olfactory Nasopalatine and Nasociliary Nerves Diagram

Nasal septum innervation: olfactory (CN I) superior roof, nasopalatine (V2 via sphenopalatine foramen) anterior septum, nasociliary (V1) anterior ethmoidal branches to anterior septum. Overlap exists.

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Zygomatic Nerve Course Branches Diagram

The zygomatic nerve (V2 branch) enters orbit via inferior orbital fissure, gives zygomaticotemporal (skin over temple) and zygomaticofacial (cheek) branches, and communicates with lacrimal nerve for parasympathetics.

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Anatomy of the Medial Calcaneal Nerve Diagram

Medial calcaneal nerve (tibial branch) supplies sensation to medial heel skin, emerges proximal to tarsal tunnel. Entrapment causes medial heel pain mimicking plantar fasciitis.

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Anatomical Course of the Musculocutaneous Nerve Diagram

The musculocutaneous nerve (C5-C7, lateral cord) pierces coracobrachialis, runs between biceps/brachialis, supplies coracobrachialis, biceps, brachialis (elbow flexion/supination), then becomes lateral cutaneous nerve of forearm for lateral forearm skin.