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

Recurrent Branch of Median Nerve Diagram

Recurrent branch of median nerve arises distal to carpal tunnel, loops around flexor pollicis brevis to supply thenar muscles (abductor pollicis brevis, opponens pollicis, superficial flexor pollicis brevis head). Its…

Organs

Spiral Ganglion Neurones Auditory Pathway Diagram

The spiral ganglion neurons (cochlear ganglion) sit in the modiolus of the cochlea, with bipolar cells sending peripheral processes to hair cells in the organ of Corti for sound transduction…

Bones

Bony Landmarks of the Pubis Diagram

Pubis bony landmarks: body (anterior), superior/inferior rami, pubic tubercle (inguinal ligament attachment), pubic crest, pectineal line, symphyseal surface.

Disease

Direct Inguinal Hernia vs Indirect Inguinal Hernia Regional Anatomy Diagram

Direct inguinal hernias push through the floor of the inguinal canal (Hesselbach's triangle, medial to inferior epigastric vessels) due to weak transversalis fascia. Indirect hernias follow the patent processus vaginalis…

Women

Internal Structure of the Breast Diagram

Breast internal structure includes 15-20 lobes of glandular tissue draining via lactiferous ducts to nipple, embedded in fat/connective tissue. Coopers ligaments provide support; Cooper suspensory.

Bones

Position of the Hyoid Bone in the Neck Diagram

The Position of the Hyoid Bone in the Neck diagram places this small, U-shaped bone right at the C3 level, floating freely without any direct joint connection to other bones.…

Medical

Development of the Bladder Ureter Mesonephric Duct Diagram

The Development of the Bladder Ureter Mesonephric Duct diagram traces embryonic stages where the mesonephric (Wolffian) duct gives rise to the ureteric bud, which induces metanephric blastema for kidney formation…

Organs

Anatomical Position of the Spleen Diagram

The spleen lies in left upper quadrant, posterior to stomach, protected by ribs 9-11, with diaphragmatic and visceral surfaces, hilum medially for vessels/lymphatics/nerves. It filters blood, stores platelets, and mounts…

Organs

Prepubic and Infrapubic Angles of the Male Urethra Diagram

The male urethra has prepubic (penile/spongy) and infrapubic (membranous/prostatic) angles: infrapubic at urogenital diaphragm (sharp bend), prepubic along corpus spongiosum. The curve influences catheter insertion and stricture locations.

Medical

Overview of the Anatomical Distribution of the Trigeminal Nerve and its Terminal Branches Diagram

Trigeminal nerve distribution covers face via ophthalmic (V1: forehead, eye, nose), maxillary (V2: cheek, upper lip/teeth, maxillary sinus), mandibular (V3: lower jaw, lower teeth, anterior tongue, muscles of mastication). Terminal…

Cell

Cellular Components of Bone Diagram

The Cellular Components of Bone diagram zooms to the microscopic level with osteoblasts building matrix, osteocytes living inside lacunae, osteoclasts breaking bone down, and the osteon units with their central…

Muscles

Coracobrachialis Biceps and Brachialis Muscles Diagram

Coracobrachialis (coracoid to mid-humerus), biceps brachii (long/short heads to radial tuberosity), brachialis (humerus to ulna coronoid). All flex elbow; biceps supinates forearm. Musculocutaneous nerve supplies.

Medical

Subdivisions of the Posterior Triangle of the Neck Subclavian Triangle and Occipital Triangle Diagram

Posterior triangle subdivisions: occipital triangle (above inferior omohyoid) contains accessory nerve, transverse cervical vessels; subclavian (below) contains brachial plexus trunks, subclavian vessels.

Medical

Neurulation Development of the Central Nervous System Diagram

Neurulation forms the CNS from neural plate (ectoderm thickening) folding into neural groove, then neural tube by fusion of neural folds. Anterior neuropore closes first (day 25), posterior last (day…

The Spinothalamic Tracts Ascending Sensory 1 Diagram

Medical

The Spinothalamic Tracts Ascending Sensory Diagram

The spinothalamic tracts carry pain, temperature, and crude touch from the body: lateral for pain/temp, anterior for touch/pressure. Fibers cross in the spinal cord shortly after entry, ascend contralaterally to…

Medical

Course of the Lateral Cutaneous Nerve of the Forearm Diagram

Lateral cutaneous nerve of forearm (from musculocutaneous) supplies lateral forearm skin, running with cephalic vein. Its sensory only.

Bones

Articulations and Parts of the Sternum Diagram

Sternum parts: manubrium (superior, clavicular notches), body (middle, costal notches), xiphoid (inferior, cartilaginous in youth). Manubriosternal joint (angle of Louis) at T4/5 level.

Organs

The Hard and Soft Palate Diagram

Hard palate (maxilla/palatine bones) forms anterior roof of mouth; soft palate (muscular: tensor/levator veli palatini, palatoglossus/pharyngeus) hangs posteriorly with uvula. It separates oral/nasal cavities during swallowing.

Medical

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…

Organs

Aorta Diagram

The aorta begins at left ventricle (ascending), arches leftward (arch with three branches), descends thoracic then abdominal to bifurcate at L4 into common iliacs. It supplies all systemic arteries except…