Anatomy System – Human Body Anatomy diagram and chart images

Top Anatomy Diagrams

Depolarization in Sinus Rhythm

Depolarization in sinus rhythm refers to the orderly spread ??? of electrical impulses through the heart that drives a normal heartbeat, starting from the sinoatrial node, the natural pacemaker located…

Cell

Connective Tissue Layers of a Neurone Diagram

This Connective Tissue Layers of a Neurone diagram breaks down the protective wrapping around peripheral nerves. Theres a strong outer epineurium around the whole bundle, perineurium encasing smaller fascicles, and…

Medical

Lesser Occipital Nerve Course Diagram

The lesser occipital nerve (C2 from cervical plexus) ascends posterior to ear, supplies skin behind auricle and upper neck. It emerges at Erbs point with other cutaneous cervical branches.

Medical

Contents of the Quadrangular Space Diagram

Quadrangular space contents include axillary nerve and posterior circumflex humeral artery/vein, bounded by teres minor superiorly, teres major inferiorly, long head triceps medially, humerus laterally. Compression causes deltoid/teres minor weakness.

Medical

ECG Tracing with Heart ContractionN

ECG tracing with heart contraction synchronizes electrical and mechanical events, where the P wave reflects atrial depolarization initiating contraction to fill ventricles, followed by the flat PR interval during AV…

Medical

Borders of the Femoral Canal Diagram

Femoral canal boundaries: anterior inguinal ligament, posterior pectineal ligament, medial lacunar ligament, lateral femoral vein. Its the medial compartment of femoral sheath, site of femoral hernias (often Richters type).

Medical

Large Medium Vein Venule

Veins progress from venules collecting capillary blood, merging into small then medium veins with increasing smooth muscle and valves preventing backflow in limbs against gravity, finally large veins like venae…

Muscles

Muscles of the Anterolateral Abdominal Wall Diagram

Anterolateral abdominal wall muscles include external oblique (down/out fibers), internal oblique (up/out), transversus abdominis (horizontal), and rectus abdominis (vertical in sheath). They compress trunk, flex, rotate, and support viscera.

Muscles

Deep Chest Muscles Serratus Anterior and Pectoralis Minor Diagram

Deep anterior chest muscles include serratus anterior (from ribs 1-8/9 to scapula medial border, protracts/rotates scapula) and pectoralis minor (ribs 3-5 to coracoid, depresses scapula, accessory respiration). Both stabilize shoulder…

Organs

Anatomical Divisions of the Small Intestines Duodenum Jejunum and Ileum Diagram

Small intestine divisions: duodenum (C-shaped, retroperitoneal, receives bile/pancreatic juice), jejunum (proximal 2/5, longer vasa recta, taller plicae), ileum (distal 3/5, more arcades, Peyers patches). They absorb nutrients progressively.

Medical

Borders of the Cavernous Sinus Diagram

The Borders of the Cavernous Sinus diagram gives a clean cross-section view of this important dural venous space next to the pituitary. The walls are clearly markedsuperior, inferior, medial, lateralwhile…

Muscles

Phrenic Nerve Motor Innervation to the Diaphragm Diagram

The phrenic nerve (C3-C5) provides sole motor innervation to diaphragm (plus sensory to pericardium/pleura). It descends on scalenus anterior, through thorax along pericardium to central tendon, ensuring breathing despite cervical…

Organs

The Aortic Valve Sinuses and Coronary Arteries Diagram

The aortic valve sinuses (of Valsalva) form three pocket-like dilations just above the aortic valve cusps. The right sinus gives origin to the right coronary artery, the left sinus to…

Medical

Somites Adjacent to the Neural Tube Diagram

In the Somites Adjacent to the Neural Tube diagram you watch early embryonic blocks of tissue lined up along the developing spinal cord. These somites will eventually give rise to…

Medical

Overview of the Peritoneal Abdominal Cavity Diagram

The peritoneal abdominal cavity includes parietal peritoneum lining walls, visceral covering organs, and mesenteries/omenta suspending structures. Greater/lesser sacs, transverse mesocolon, and root of mesentery divide spaces for fluid movement.

Organs

Nerves Innervating the Urinary SystemN

Nerves innervating the urinary system include sympathetic from T10-L2 inhibiting bladder contraction and promoting sphincter tone for storage, parasympathetic from S2-4 stimulating detrusor and relaxing internal sphincter for voiding, somatic…

Muscles

Cardiac Muscle

An illustration of cardiac muscle highlights the unique structure that allows the heart to contract continuously without fatigue. The diagram shows branched muscle fibers connected by intercalated discs, which contain…

Medical

Course of the Superior Epigastric Artery Diagram

The superior epigastric artery (from internal thoracic) descends in rectus sheath, anastomoses with inferior epigastric, supplying rectus abdominis and anterior abdominal wall. It forms part of Hesselbachs triangle boundary.

Organs

Overview of the Cerebrum Diagram

The cerebrum overview shows two hemispheres divided by longitudinal fissure, with frontal (planning, motor), parietal (sensory, spatial), temporal (auditory, memory), occipital (visual) lobes, plus insula deep in lateral sulcus and…

Medical

The Superficial Veins of the Upper Limb Cephalic and Basilic Veins Diagram

Superficial upper limb veins: cephalic (lateral, thumb to deltoid/axillary), basilic (medial, little finger to axillary), median cubital (connects cephalic/basilic at elbow). Theyre common IV sites.