The eustachian tube connects the middle ear to the nasopharynx, allowing pressure equalization and drainage of secretions. Its cartilaginous portion supports patency, while the bony portion maintains structural stability. Dysfunction can cause middle ear infections, hearing loss, or barotrauma. Its View Diagram Overview of the Eustachian Tube
The bulbourethral glands, also known as Cowpers glands, are small paired glands of the male reproductive system. This anatomy diagram of the anatomical position of the bulbourethral glands shows their location within the deep perineal pouch, posterolateral to the membranous View Diagram Anatomical Position of the Bulbourethral Glands
The urinary tract consists of the kidneys, ureters, bladder, and urethra. The kidneys filter blood to form urine, regulating fluid and electrolyte balance. Urine passes through the ureters to the bladder, where it is stored until micturition. The bladders detrusor View Diagram Overview of the Urinary Tract Kidney Ureter and Bladder
The aorta is the largest artery in the body, carrying oxygenated blood from the heart to systemic circulation. This anatomy diagram of the aorta illustrates its ascending, arch, and descending portions. It highlights major branches supplying the head, upper limbs, View Diagram Aorta
The median nerve in the hand gives off branches including the recurrent branch to the thenar muscles and digital cutaneous branches to the fingers. These branches provide motor and sensory innervation essential for hand function, grip, and dexterity. Knowledge of View Diagram Branches of the Median Nerve in the Hand
The pterygopalatine ganglion is a parasympathetic ganglion located in the pterygopalatine fossa. It receives preganglionic fibers from the facial nerve and sends postganglionic fibers to the lacrimal gland, nasal cavity, palate, and pharynx. The ganglion is a relay station for View Diagram The Pterygopalatine Ganglion and Branches
The internal mammary artery, also known as the internal thoracic artery, is a vital vessel supplying the anterior chest wall and breasts. This anatomy diagram of the anatomical course of the internal mammary artery shows its origin from the subclavian View Diagram Anatomical Course of the Internal Mammary Artery
Aortic dissection is a life-threatening condition involving a tear in the aortic wall. This anatomy diagram shows separation of layers and formation of a false lumen. Understanding this pathology is essential in emergency cardiovascular care.
The facial artery arises from the external carotid artery and takes a tortuous course across the face. It ascends deep to the submandibular gland, curves around the inferior border of the mandible, and travels toward the medial angle of the View Diagram Facial Artery Anatomical Course
The platysma is a superficial muscle of the neck embedded within the superficial cervical fascia. It extends from the lower jaw, covering the anterior neck, and inserts into the clavicle and upper thoracic region. The platysma functions to tense the View Diagram The Platysma Muscle Superficial Cervical Fascia
The erector spinae group, including iliocostalis, longissimus, and spinalis, extends along the vertebral column and supports posture, trunk extension, and lateral flexion. These muscles stabilize the spine during movement, lifting, or bending, and interact with deep core muscles to maintain View Diagram The Erector Spinae of the Back
The labyrinthine artery supplies the inner ear structures responsible for hearing and balance. It usually arises from the anterior inferior cerebellar artery, although it may branch directly from the basilar artery. It enters the internal acoustic meatus alongside the facial View Diagram The Labyrinthine Artery
The cerebellum is positioned in the posterior cranial fossa beneath the occipital lobes of the brain. This anatomy diagram of the anatomical position of the cerebellum illustrates its location posterior to the brainstem and its separation from the cerebrum by View Diagram Anatomical Position Cerebellum
CT scans of cerebellar tonsil herniation show downward displacement through the foramen magnum, often associated with Chiari malformations. This can compress the brainstem, cerebellum, and cerebrospinal fluid pathways, causing headache, dizziness, motor or sensory deficits, and hydrocephalus. Imaging demonstrates the View Diagram CT Scan of Cerebellar Tonsil Herniation
X-rays of rickets reveal characteristic changes in bones due to vitamin D deficiency, including widened, cupped, and frayed metaphyses, especially at the wrist and knee. Rickets affects bone mineralization in children, leading to deformities like bowing of long bones and View Diagram X Ray of Rickets
The bronchial tree consists of the trachea, primary bronchi, secondary bronchi, tertiary bronchi, and smaller bronchioles that ultimately lead to alveoli. It serves as the conduit for air to reach the lungs, where gas exchange occurs. The walls of the View Diagram The Bronchial Tree
Quinsy, also known as a peritonsillar abscess, is a collection of pus that forms in the tissue around the tonsil. It usually develops as a complication of untreated or severe tonsillitis. Patients often experience intense throat pain on one side, View Diagram Quinsy Inflammation of Peritonsillar Tissue
The vagus nerve is the tenth cranial nerve and has a wide distribution. It exits the skull through the jugular foramen and descends within the carotid sheath. In the thorax, it gives branches to the heart and lungs before contributing View Diagram Overview of the Major Branches and Anatomical Course of the Vagus Nerve
The ophthalmic nerve is the first division of the trigeminal nerve (cranial nerve V1) and provides sensory innervation to the upper face and orbit. This anatomy diagram of the anatomical course of the ophthalmic nerve illustrates its origin from the View Diagram Anatomical Course of the Ophthalmic Nerve
The supraclavicular nerves arise from the cervical plexus (C3C4) and supply the skin over the shoulder, clavicle, and upper chest. They are important in sensory innervation and commonly targeted in regional anesthesia. Knowledge of their course is essential in surgery, View Diagram Supraclavicular Nerves
