The hepatic lobule is the functional unit of the liver, consisting of hepatocytes arranged around a central vein, with portal triads at the periphery. Knowledge of lobular structure is essential for hepatologists, surgeons, and medical students in managing liver disease, View Diagram Hepatic Lobule
The ventricular system includes paired lateral ventricles, the third ventricle, cerebral aqueduct, and fourth ventricle, forming a pathway for cerebrospinal fluid circulation. Superior views of ventricular casts illustrate the precise arrangement of cavities and foramina. This system cushions the brain, View Diagram Superior View of Cast of Ventricular System
The anterior triangle of the neck is a key anatomical region bounded by the anterior border of the sternocleidomastoid, inferior border of the mandible, and midline of the neck. It contains vital structures including the carotid arteries, internal jugular vein, View Diagram Borders of the Anterior Triangle of the Neck
Muscles attaching to the pelvic body include the iliacus, psoas major, rectus abdominis, and pelvic floor muscles such as the levator ani. These muscles contribute to pelvic stability, posture, and locomotion, while also supporting pelvic organs. The iliopsoas muscles are View Diagram Muscles attaching to the Pelvic Body
The male urethra consists of the prostatic, membranous, spongy (penile), and navicular parts, each with specific anatomical features and surrounding structures. It allows passage of urine and semen and is surrounded by sphincteric and erectile tissues. Knowledge of the male View Diagram Parts of the Male Urethra
The spermatic cord is a vital structure of the male reproductive system that suspends the testis within the scrotum. This anatomy diagram of the anatomical course of the spermatic cord shows its formation at the deep inguinal ring, passage through View Diagram Anatomical Course of the Spermatic Cord
The retromandibular vein courses through the parotid gland and drains into the external jugular vein or common facial vein. Its tributaries include the superficial temporal and maxillary veins. Knowledge of the retromandibular vein anatomy is essential for surgeons, radiologists, and View Diagram Retromandibular Vein Course and Tributaries
A typical rib consists of a head, neck, tubercle, and body. The head articulates with the thoracic vertebrae at costovertebral joints, while the tubercle connects with the transverse process. The shaft curves anteriorly and inferiorly, forming the costal angle before View Diagram Structure of a Typical Rib
Coronal sections of the ear show mastoid air cells within the temporal bone, which communicate with the middle ear and help in sound resonance and pressure regulation. Knowledge of mastoid anatomy is essential for ENT surgeons, radiologists, and medical students View Diagram Coronal Section of the Ear Showing the Mastoid Air Cells
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
