Posted inMedical
Posterior Cutaneous Nerve of Thigh Diagram
Posterior cutaneous nerve of thigh (S1-S3 posterior rami) supplies skin over posterior thigh and gluteal fold, running with sciatic nerve initially then superficially.
Posted inCell
Glomerulus Diagram
The glomerulus is a tuft of fenestrated capillaries inside Bowmans capsule, forming the filtration unit of the nephron. It receives blood from the afferent arteriole, filters plasma (excluding large proteins/cells)…
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Course of the Great Auricular Nerve Diagram
The great auricular nerve (C2-C3 from cervical plexus) ascends behind sternocleidomastoid, emerges at Erbs point, and supplies skin over parotid, mastoid, auricle, and angle of mandible. Its commonly blocked for…
Posted inBones
C spine picture Diagram
C-spine picture shows seven cervical vertebrae: C1 atlas (no body, anterior/posterior arches), C2 axis (dens/odontoid), C3-C6 typical (bifid spinous, transverse foramina), C7 prominent spinous (vertebra prominens).
Posted inBones
Monteggia Fracture of the Radius and Ulna Diagram
Monteggia fracture: proximal ulna fracture with radial head dislocation (anterior most common). Bado classification types I-IV; requires ORIF for ulna and radial head stability.
Posted inMuscles
The Rotator Cuff Muscles of the Shoulder Joint Diagram
Rotator cuff muscles (supraspinatus, infraspinatus, teres minor, subscapularis) stabilize humeral head in glenoid during motion, with supraspinatus initiating abduction. Tears cause pain/weakness.
Posted inOrgans
Human Heart Anatomy Diagram
The human heart anatomy diagram shows how this powerful muscle works as the body’s central pump, constantly circulating blood to keep us alive. The heart is divided into four main…
Posted inBones
Lateral View of the Sella Turcica Diagram
The sella turcica in lateral view is a saddle-shaped depression in sphenoid body housing the pituitary, bounded by tuberculum sellae anteriorly, dorsum sellae posteriorly, and anterior/posterior clinoids.
Posted inBones
Anatomical Position of the Humerus Diagram
The Anatomical Position of the Humerus diagram places the humerus in standard anatomical position with greater tubercle lateral, capitulum anterior, and trochlea medial. It labels head, surgical/anatomical neck, tubercles, shaft,…
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Posterior inferior cerebellar artery orgin and course Diagram
The posterior inferior cerebellar artery (PICA) usually arises from vertebral artery near basilar origin, courses around medulla to supply inferior cerebellum, lateral medulla, and choroid plexus of fourth ventricle. Occlusion…
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Infratrochlear Nerve Course Supply Diagram
The infratrochlear nerve (terminal branch of nasociliary, V1) exits orbit below trochlea, supplies sensation to medial upper eyelid, caruncle, lacrimal sac, root of nose, and skin between eye and nose…
Posted inBones
Ligaments of the Lumbar Spine Diagram
The Ligaments of the Lumbar Spine diagram displays the strong bands that hold the lower vertebrae togetheranterior and posterior longitudinal, ligamentum flavum, interspinous, supraspinous, and others. Seeing them all in…
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Labelled Carotid and Prevertebral sheaths Diagram
Labelled carotid sheath contains common/internal carotid artery, internal jugular vein, vagus nerve (CN X), sympathetic chain (cervical ganglia), deep cervical lymph nodes. Prevertebral fascia encloses prevertebral muscles (longus colli/capitis), brachial…
Posted inBones
Overview of the Bones of the Human Foot Diagram
Human foot bones: tarsals (talus, calcaneus, navicular, cuboid, cuneiforms), metatarsals (five), phalanges (14: proximal/middle/distal except hallux two). Arches (medial longitudinal, lateral, transverse) distribute weight.
Posted inCell
Clonal Selection of B Cells
An immune system diagram illustrating clonal selection of B cells explains how specific antibodies are produced. It shows a diverse population of B cells, each with a unique receptor, and…
Posted inCell
Male Chromosomes
Male chromosomes consist of 46 total, including 22 autosomal pairs and one X and one Y sex chromosome determining maleness via SRY gene triggering testicular development, with Y carrying few…
Posted inOrgans
Layers of the Gastrointestinal Tract
The gastrointestinal tract shares four concentric layers from esophagus to rectum: innermost mucosa with epithelium, lamina propria, muscularis mucosae; submucosa dense connective with glands, vessels, Meissner plexus; muscularis propria inner…
Posted inMuscles
Action Potential Heart Contraction
A heart physiology illustration linking action potentials to contraction demonstrates how electrical signals drive each heartbeat. It traces the spread of an action potential through cardiac muscle cells, beginning with…
Posted inMedical
Embryo Week 3
Embryo week 3 is a pivotal period of gastrulation where the primitive streak appears on the epiblast, cells ingress to form mesoderm and definitive endoderm, displacing hypoblast, while the notochord…
Posted inOrgans
Cardiac ConductionN
A cardiac conduction diagram maps the hearts electrical system from the sinoatrial node through the atrioventricular node and into the ventricles. It shows how timing and coordination ensure efficient contraction.…