The pancreas is divided into four main parts: the head, neck, body, and tail. The head lies within the C-shaped curve of the duodenum, making it closely related to the bile duct and an important area in pancreatic disease. The View Diagram Parts of the Pancreas
The trachea bifurcates at the level of the sternal angle into the right and left main bronchi. The right bronchus is wider, shorter, and more vertical than the left, making it more prone to foreign body aspiration. Each main bronchus View Diagram The Right and Left Bronchi Bifurcation of the Trachea
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 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 duodenum is divided into four parts: superior, descending, horizontal, and ascending. It begins at the pylorus and ends at the duodenojejunal flexure. The descending part receives bile and pancreatic secretions. Its C-shaped curve surrounds the head of the pancreas View Diagram Parts of the Duodenum Small Intestine
The fallopian tubes, also called uterine tubes, are paired structures connecting the ovaries to the uterus. They consist of four parts: infundibulum with fimbriae, ampulla, isthmus, and uterine part. These tubes facilitate ovum capture, fertilization, and transport to the uterus. View Diagram The Parts of the Fallopian Tubes
The spleen is a highly vascular organ located in the left upper quadrant of the abdomen. This anatomy diagram of the anatomical position of the spleen shows its placement beneath the left hemidiaphragm, protected by the 9th to 11th ribs. View Diagram Anatomical Position of the Spleen
Testicular descent during embryology involves migration from the abdominal cavity into the scrotum via the inguinal canal, guided by the gubernaculum. Knowledge of this process is essential for pediatric surgeons, urologists, and medical students in managing cryptorchidism, hernia, or infertility. View Diagram Diagram of the Descent of the Testis Embryology
The pancreatic duct joins the bile duct at the major duodenal papilla, allowing pancreatic enzymes and bile to enter the duodenum for digestion. The duct system includes the main pancreatic duct, accessory duct, and associated sphincter muscles, coordinating digestive flow. View Diagram Pancreatic duct Bile duct and Major duodenal Papilla
The lungs are paired respiratory organs located within the thoracic cavity on either side of the mediastinum. This anatomy diagram of the anatomical position of the lungs shows their apex extending above the clavicle and their base resting on the View Diagram Anatomical Position of the Lungs
The lacrimal gland is responsible for tear production and ocular surface lubrication. This anatomy diagram of the anatomical location of the lacrimal gland shows its position in the superolateral part of the orbit within the lacrimal fossa of the frontal View Diagram Anatomical Location of the Lacrimal Gland
The glomerulus is a network of capillaries within the renal nephron that filters blood to form urine. Surrounded by Bowman’s capsule, it allows selective filtration based on size and charge, maintaining fluid and electrolyte balance. Understanding glomerular anatomy is essential View Diagram Glomerulus
The esophagus consists of mucosa, submucosa, muscularis externa, and adventitia layers, each with specialized structure and function for propulsion of food. Knowledge of esophageal layers is essential for gastroenterologists, surgeons, and medical students in managing dysphagia, esophageal cancer, or surgical View Diagram Layers of the Oesophagus
The mediastinum is subdivided into superior, anterior, middle, and posterior compartments, each containing vital structures such as the heart, great vessels, trachea, esophagus, and lymph nodes. Knowledge of these subdivisions is essential for surgeons, radiologists, and medical students in planning View Diagram The Superior Anterior Middle and Posterior Mediastina
The aortic valve consists of three cusps—right, left, and posterior—which form small bulging spaces known as the aortic sinuses. These sinuses help maintain smooth blood flow and create eddies that prevent the cusps from sticking to the aortic wall. The View Diagram The Aortic Valve Sinuses and Coronary Arteries
From an anterior view, the venous drainage of the heart is dominated by the great and small cardiac veins, which work in parallel with the coronary arteries. The great cardiac vein begins near the apex of the heart and ascends View Diagram Anterior View of the Venous Drainage of the Heart Small and Great Cardiac Veins
The posterior blood supply of the heart is primarily provided by the posterior descending artery and the branches of the circumflex and right coronary arteries, depending on coronary dominance. These vessels deliver oxygenated blood to the diaphragmatic surfaces of the View Diagram Blood Supply to the Heart Posterior
The internal structure of the kidney is organized into an outer cortex and an inner medulla, which together contain millions of nephrons that filter blood and produce urine. The cortex houses the glomeruli and convoluted tubules responsible for the initial View Diagram Internal Structure of the Kidney
The Peritoneum: The peritoneum is a double-layered serous membrane lining the abdominal cavity, consisting of the parietal layer (lining the cavity) and visceral layer (covering organs), which supports and reduces friction between organs.
The Bladder: The urinary bladder is a muscular, expandable organ that stores urine until voluntary release during urination, with a transitional epithelium that allows stretching.
