The superior rectal artery supplies the rectum and upper anal canal, continuing from the inferior mesenteric artery. Knowledge of its course is essential for surgeons, gastroenterologists, and medical students in managing colorectal surgery, bleeding, or ischemia. Understanding arterial supply ensures View Diagram Superior Rectal Artery and Rectum
The bony orbit houses the globe, extraocular muscles, optic nerve, and orbital vasculature. Arteries such as the ophthalmic artery supply the eye and surrounding structures, while cranial nerves III, IV, V1, and VI control movement and sensation. Ligaments, connective tissue, View Diagram Contents of the Bony Orbit Arteries Optic Nerve and Muscles
The brain receives arterial supply primarily from the internal carotid and vertebral arteries. Internal carotids supply the anterior and middle cerebral regions, while vertebral arteries merge into the basilar artery, supplying the posterior brain, brainstem, and cerebellum. Anastomoses form the View Diagram Overview of Arterial Supply to the Brain Internal Carotid and Vertebral Arteries
The anterior view of the borders of the cubital fossa demonstrates its triangular boundaries formed by the brachioradialis and pronator teres muscles. This anatomy diagram highlights surface landmarks and underlying structures. It provides a clear understanding of the region used View Diagram Anterior View of the Forearm Borders of the Cubital Fossa
The wrist joint involves articulation between the distal radius, articular disc, and proximal carpal bones. This anatomy diagram of the articulating surfaces of the wrist joint illustrates the scaphoid, lunate, and triquetrum articulating with the radius. It highlights the role View Diagram Articulating Surfaces of the Wrist Joint Radius Articular Disk and Carpal Bones
The cutaneous branches of the sciatic nerve provide sensory innervation to the posterior thigh, leg, and lateral foot via the posterior femoral cutaneous, sural, and other terminal branches. Knowledge of this sensory distribution is essential for surgeons, anesthetists, and medical View Diagram The Sensory or Cutaneous Innervation of the Branches of the Sciatic Nerve
The prepubic and infrapubic angles of the male urethra refer to anatomical curves along the urethra that influence urinary flow and catheterization. Knowledge of these angles is essential for urologists, surgeons, and medical students in performing urethral instrumentation, managing strictures, View Diagram Prepubic and Infrapubic Angles of the Male Urethra
Intraperitoneal organs, such as the stomach and small intestine, are completely enveloped by visceral peritoneum, whereas retroperitoneal organs, including the kidneys and pancreas, lie behind it. Understanding the distinction is critical for surgeons, radiologists, and medical students in planning surgical View Diagram Intraperitoneal and Retroperitoneal Organs
The mastoid fossa is a depression within the temporal bone that houses the mastoid air cells and provides attachment for the sternocleidomastoid and other muscles. Its air cells communicate with the middle ear, playing a role in pressure regulation. Knowledge View Diagram Mastoid Fossa Overview
The cricothyroid muscle is a small but very important muscle of the larynx. It connects the cricoid cartilage to the thyroid cartilage and works by tilting the thyroid cartilage forward. This movement stretches and tenses the vocal cords, which increases View Diagram Cricothyroid Muscle
The supraorbital nerve, a branch of the ophthalmic division of the trigeminal nerve, exits the supraorbital foramen to supply sensation to the forehead, scalp, and upper eyelid. Knowledge of its course is essential for ophthalmologists, plastic surgeons, and medical students View Diagram Course of the Supraorbital Nerve
The kidneys receive a rich vascular supply essential for filtration and homeostasis. This anatomy diagram of the arterial and venous supply to the kidneys illustrates the renal arteries branching directly from the abdominal aorta and entering the hilum. It highlights View Diagram Arterial and Venous Supply to the Kidneys
The left gastro-omental artery arises from the splenic artery along the greater curvature of the stomach. It supplies the stomachÂ’s fundus and body and contributes to anastomoses with the right gastro-omental artery. This vascular arcade is important for maintaining perfusion, View Diagram Left Gastro Omental Artery
Neurones can be structurally classified as multipolar, bipolar, or unipolar (pseudounipolar). Multipolar neurones have one axon and multiple dendrites and are common in the central nervous system. Bipolar neurones have one axon and one dendrite and are found in sensory View Diagram Structural Classifications of a Neurone
The distal end of the spinal cord includes the conus medullaris and lumbar cistern, containing cerebrospinal fluid and nerve roots of the cauda equina. The lumbar cistern extends from the conus to the sacral region, providing a safe site for View Diagram Distal End of the Spinal Cord The Lumbar Cistern
Typical thoracic vertebrae have distinguishing features including a heart-shaped vertebral body, costal facets for rib articulation, and long, downward-sloping spinous processes. They provide stability, support for the thoracic cage, and articulation for ribs. Knowledge of thoracic vertebra anatomy is essential View Diagram Distinguishing Features of a Typical Thoracic Vertebrae
The suboccipital triangle, located deep in the posterior neck, is bordered by the rectus capitis posterior major, obliquus capitis superior, and obliquus capitis inferior muscles. The vertebral artery and suboccipital nerve pass through this space. Knowledge of its borders and View Diagram Suboccipital Triangle Borders and Vertebral Artery
The carpal bones of the hand are eight small bones arranged in proximal and distal rows forming the wrist joint. These include the scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, and hamate. They articulate with the radius, ulna, metacarpals, and View Diagram Diagram of the Carpal Bones of the Hand
The medullary pyramids are paired structures on the ventral surface of the medulla oblongata, containing corticospinal tracts responsible for voluntary motor control. Knowledge of pyramidal anatomy is essential for neurologists, neurosurgeons, and medical students in managing strokes, lesions, or neurodegenerative View Diagram Medullary Pyramids
The muscles of mastication include the medial and lateral pterygoids, which move the mandible for elevation, protrusion, and side-to-side motion. The medial pterygoid elevates and assists in grinding, while the lateral pterygoid protracts and depresses the mandible. They are innervated View Diagram Muscles of Mastication Medial and Lateral Pterygoids
