Anatomy System – Human Body Anatomy diagram and chart images – Page 2

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).…

Organs

Overview of the Urinary Tract Kidney Ureter and Bladder Diagram

The urinary tract includes kidneys (urine production), ureters (peristaltic transport), bladder (storage), urethra (exit). Kidneys filter blood, ureters drain to bladder trigone, bladder expands/contract via detrusor.

Organs

Structure of the Testes and Epididymis Diagram

Testes and epididymis structure: tunica albuginea encases seminiferous tubules (sperm production) in testes; epididymis (head/body/tail) stores/matures sperm. Rete testis connects them.

Dental

Tooth

Tooth consists of crown visible enamel hardest substance covering dentin pulp chamber nerves vessels, neck gum junction, root cementum periodontal ligament anchoring alveolar bone, dentin tubules sensitive, pulp vital reactive…

Medical

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…

Medical

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…

Muscles

Muscular Attachments to the Mandible Body Ramus Diagram

Muscular attachments to mandible: body (geniohyoid/genioglossus anterior, mylohyoid lateral, digastric anterior belly), ramus (masseter lateral, medial pterygoid medial, temporalis coronoid). They enable mastication, speech, swallowing.

Organs

Overview of Conduction Pathway Components Diagram

The cardiac conduction pathway starts at the SA node (pacemaker), spreads through atria to AV node (delay), then bundle of His, left/right bundles, and Purkinje fibers for rapid ventricular activation.…

Organs

Anatomical Position and Relations of Pituitary Gland Diagram

The pituitary gland sits in sella turcica, attached to hypothalamus by infundibulum, surrounded by cavernous sinuses laterally, optic chiasm superiorly, sphenoid sinus inferiorly. Relations affect surgical/transsphenoidal approaches and compression symptoms.

Medical

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…

Medical

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.

Bones

Bony Landmarks of the Posterior Surface of the Scapula Diagram

Posterior scapula surface landmarks: spine (horizontal ridge), supraspinous/infraspinous fossae, acromion (lateral extension), glenoid cavity (lateral), superior/inferior angles, medial border (vertebral), lateral border (axillary).

Medical

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.