The facial skeleton is composed of multiple bones including the maxilla, mandible, zygomatic, nasal, and lacrimal bones, providing structure and support for the face. These bones contribute to chewing, breathing, vision, and expression. Knowledge of facial bone anatomy is crucial View Diagram Bones of the Facial Skeleton
Peristaltic contractions of the stomach involve coordinated smooth muscle activity that mixes and propels chyme toward the pylorus. The muscular layerslongitudinal, circular, and obliquefacilitate these rhythmic movements. Neural and hormonal control, including the enteric nervous system and gastrin, regulates peristalsis. View Diagram Peristaltic Contractions of the Stomach
The sagittal section of the female pelvis reveals the anatomical relations of the internal reproductive tract, including the uterus, cervix, vagina, bladder, and rectum. The uterus lies anterior to the rectum and posterior to the bladder, with the broad ligaments View Diagram Sagittal Section of the Female Pelvis Anatomical Relations of the Internal Reproductive Tract
Gastric acid secretion is a vital physiological process that supports digestion and protects against ingested pathogens. This anatomy diagram of acid secretion illustrates the structure of the gastric glands and highlights the role of parietal cells in producing hydrochloric acid. View Diagram Acid Secretion
Untreated carpal tunnel syndrome (CTS) is characterized by prolonged compression of the median nerve within the carpal tunnel, causing numbness, tingling, and weakness in the hand and fingers. Over time, untreated CTS can lead to thenar muscle atrophy, reduced grip View Diagram Untreated CTS
The right atrium and interatrial septum form the hearts venous receiving chamber, collecting deoxygenated blood from the superior and inferior vena cava and coronary sinus. The interatrial septum separates the right atrium from the left atrium, featuring the fossa ovalis View Diagram Right Atrium and Interatrial Septum
Hydrocephalus appears on CT scans as dilation of the cerebral ventricles due to cerebrospinal fluid accumulation. It can be communicating, caused by impaired absorption, or non-communicating, caused by obstruction within the ventricular system. Symptoms include headache, nausea, vomiting, cognitive decline, View Diagram Hydrocephalus on a CT Scan
Lordosis refers to the normal anterior curvature of the cervical and lumbar spine, which maintains balance and supports body weight. Excessive lordosis can lead to postural problems and lower back pain. Knowledge of spinal curvature is essential for orthopedic surgeons, View Diagram Lordosis
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
