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

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…

Medical

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

Medical

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,…

Bones

Mastoid Fossa Overview Diagram

The mastoid fossa (antrum) is the largest mastoid air cell, opening into middle ear via aditus ad antrum, lined by mucosa continuous with tympanic cavity. It provides space for middle…

Medical

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.

Medical

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.

Disease

Radial Nerve Palsy Wristdrop Diagram

Radial nerve palsy causes wrist drop (loss of extensors), sensory loss dorsum hand/thumb-index-middle. Common from humeral shaft fracture (spiral groove) or Saturday night compression.

Medical

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.

Medical

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.

Medical

Course of the Supraorbital Nerve Diagram

The supraorbital nerve (V1 branch) exits supraorbital foramen/notch, supplying sensation to forehead, upper eyelid, and frontal scalp. It runs with supraorbital artery/vein.

Medical

Venous Drainage of the Pelvis Diagram

Pelvic venous drainage includes internal iliac veins (gluteal, obturator, vesical, uterine/vaginal, rectal plexuses), external iliac (femoral continuation), common iliac to IVC. Valveless plexuses allow retrograde spread in malignancy.

Organs

Peristaltic Contractions of the Stomach Diagram

Peristaltic contractions of the stomach involve coordinated circular muscle waves starting at the fundus/body, progressing toward the pylorus to mix and propel chyme. Theyre regulated by enteric nervous system, vagus…

Muscles

Third Layer of Plantar Muscles Diagram

Third layer of plantar muscles includes flexor hallucis brevis (to big toe), adductor hallucis (oblique/transverse heads to big toe), and flexor digiti minimi brevis (to little toe). They support toe…

Organs

Vasculature of the Lungs Pulmonary Arteries and Veins Diagram

Lung vasculature: pulmonary arteries (deoxygenated from right ventricle) follow bronchi to alveoli; pulmonary veins (oxygenated) drain to left atrium. Bronchial arteries (systemic from thoracic aorta) supply airways.

Muscles

Interspinales Muscle of the Back Diagram

Interspinales muscles span between adjacent spinous processes (cervical/thoracic/lumbar), aid extension, stabilize vertebrae during posture/movement. Part of deep back muscles.

Medical

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.

Cell

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)…

Medical

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…

Bones

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).

Bones

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.