The testes are paired male gonads responsible for sperm production and testosterone secretion. Each testis is surrounded by a fibrous tunica albuginea, and internally divided into lobules containing seminiferous tubules. Sperm produced here pass into the rete testis and efferent View Diagram Structure of the Testes and Epididymis
A micrograph of compact bone shows the highly organized structure of osteons, also known as Haversian systems. Each osteon consists of concentric lamellae arranged around a central Haversian canal that contains blood vessels and nerves. Between the lamellae are lacunae View Diagram Micrographc of Compact Bone Osteon
The middle cerebral artery (MCA) supplies lateral portions of the frontal, temporal, and parietal lobes. Infarcts in the MCA territory can cause contralateral hemiparesis, sensory deficits, aphasia, and visual field defects. Imaging and clinical correlation help localize the stroke and View Diagram Middle Cerebral Artery Infarct
The knee joint is a complex hinge joint, reinforced by multiple bursae that reduce friction between bones, tendons, and muscles. On sagittal view, the joint shows articulations between the femur, tibia, and patella, with the menisci cushioning the tibiofemoral interface. View Diagram Sagittal View of the Knee Joint Diagram of the Knee Bursae
Cutaneous innervation of the lower leg and ankle involves branches of the saphenous, superficial fibular, sural, and tibial nerves, providing sensation to the anterior, lateral, and posterior compartments. Knowledge of this innervation is essential for surgeons, anesthetists, and medical students View Diagram Cutaneous Innervation of the Lower Leg Ankle
The elbow joint consists of articulations between the humerus, radius, and ulna, allowing for flexion, extension, and rotation of the forearm. Key structures include the trochlea, capitulum, olecranon, and radial head, which interact to provide smooth and stable movement. Ligaments View Diagram Articulations of the Elbow Joint
The lacrimal apparatus consists of lacrimal glands, ducts, sac, and nasolacrimal duct, facilitating tear production, distribution, and drainage. Knowledge of its anatomy is essential for ophthalmologists, ENT surgeons, and medical students in managing epiphora, dacryocystitis, or surgical procedures. Understanding the View Diagram The Lacrimal Apparatus
The spinal nerves originate from the spinal cord through paired dorsal (sensory) and ventral (motor) roots that merge to form mixed nerves. Each nerve corresponds to a specific spinal segment and exits the vertebral column through intervertebral foramina. Understanding spinal View Diagram Origin of the Spinal Nerves from the Spinal Cord
Cleidocranial dysplasia is a genetic condition affecting bone and tooth development. It can result in delayed tooth eruption and presence of supernumerary teeth.
The bony surfaces of the temporomandibular joint include the mandibular condyle and the temporal bones articular fossa, forming a hinge and sliding joint. These surfaces allow jaw movements such as opening, closing, and lateral motion. Knowledge of TMJ anatomy is View Diagram boney surfaces of the temporomandibular joint
The talus articulates with the tibia, fibula, and calcaneus in the ankle joint, transmitting weight from the leg to the foot. Knowledge of talar anatomy is essential for orthopedic surgeons, radiologists, and medical students in managing fractures, arthritis, or reconstructive View Diagram The Talus in the Ankle Joint
Laparoscopic cholecystectomy is a minimally invasive procedure to remove the gallbladder, requiring knowledge of cystic duct and artery anatomy, Calots triangle, and surrounding structures. Understanding surgical anatomy is essential for surgeons and medical students to prevent bile duct injury, ensure View Diagram Laparoscopic Cholecystectomy
The subphrenic and subhepatic recesses are peritoneal spaces situated beneath the diaphragm and liver, respectively. The subphrenic recess lies between the diaphragm and anterior surface of the liver, while the subhepatic space is located between the liver and transverse colon. View Diagram Subphrenic and Subhepatic Recesses
The pineal gland is a small endocrine structure located deep within the brain. This anatomy diagram of the anatomical position of the pineal gland shows its placement in the midline, between the two cerebral hemispheres, within the epithalamus near the View Diagram Anatomical Position of the Pineal Gland
Anatomical planes, including sagittal, coronal, and transverse planes, are reference divisions of the human body used to describe location and orientation of structures. Knowledge of these planes is essential for clinicians, surgeons, radiologists, and medical students in imaging interpretation, surgical View Diagram The Anatomical Planes of the Human Body
Hiatus hernias occur when part of the stomach protrudes through the esophageal hiatus of the diaphragm. They are classified into sliding, paraesophageal, and mixed types, each with different clinical implications. Sliding hernias involve the gastroesophageal junction moving upward, while paraesophageal View Diagram Classifications of Hiatus Hernias
The posterior surface of the scapula contains landmarks including the spine, acromion, and infraspinous fossa. These features provide attachment for muscles that stabilize and move the shoulder, such as the trapezius and infraspinatus. Knowledge of scapular anatomy is essential for View Diagram Bony Landmarks of the Posterior Surface of the Scapula
The abdominal aorta gives off multiple branches supplying the gastrointestinal tract, kidneys, adrenal glands, and pelvic organs. Key branches include the celiac trunk, superior and inferior mesenteric arteries, renal arteries, and gonadal arteries. Knowledge of these branches is crucial for View Diagram Branches of the Abdominal Aorta
The supratrochlear nerve, a branch of the ophthalmic division of the trigeminal nerve, supplies the skin of the medial forehead and upper eyelid. Knowledge of its course is essential for neurologists, surgeons, and medical students in performing nerve blocks, trauma View Diagram Course of the Supratrochlear Nerve
