What are the islets of Langerhans? The islets of Langerhans (islets of Langerhans, Langerhans cells, islet cells) consist of about 2000 to 3000 glandular cells surrounded by numerous blood capillaries and have a diameter of only 75 to 500 micrometers. They are irregularly distributed throughout the pancreas, but are found clustered in the tail region … Islets of Langerhans: Location and Function
What is smegma? Smegma is a sebaceous, yellowish-white mass between the glans penis and the foreskin. It is also called foreskin sebum and consists of secretion from the sebaceous glands located in the skin of the glans and exfoliated epithelial cells from the inside of the foreskin (prepuce). In women, smegma also forms – it … Smegma – Composition and Function
What is the sacrum? The sacrum (Os sacrum) is the penultimate segment of the spine. It consists of the five fused sacral vertebrae and their rib remnants, which together form a large, strong and rigid bone. This has a wedge shape: it is broad and thick at the top and becomes narrow and thin toward … Sacrum: Structure and Function
How the pulmonary circulation works The pulmonary circulation, together with the great or systemic circulation, forms the human circulatory system. It begins in the right heart: the blood, which is low in oxygen and loaded with carbon dioxide, coming from the body is pumped via the right atrium and the right ventricle into the truncus … Pulmonary Circulation: Structure and Function
What is the heartbeat? The heartbeat marks the rhythmic contraction of the heart muscle (systole), which is followed by a short relaxation phase (diastole). It is triggered by electrical impulses of the excitation conduction system, which originate in the sinus node. The sinus node is a collection of specialized cardiac muscle cells in the wall … Heartbeat: More about Function and Disorders
What are blood vessels? Blood vessels are hollow organs. With a length of around 150,000 kilometers, these tubular, hollow structures create an interconnected network that runs through our entire body. Connected in series, it would be possible to circumnavigate the earth almost 4 times. Blood vessels: structure The vessel wall encloses a cavity, the so-called … Blood Vessels: Structure and Function
What is the mandible? The lower jaw bone consists of a body (corpus mandibulae), the rear ends of which merge into an ascending branch (ramus mandibulae) on both sides at the angle of the jaw (angulus mandibulae). The angle formed by the body and branch (angulus mandibulae) varies between 90 and 140 degrees depending on … Mandible: Anatomy & Function
What is the trachea? What is the function of the trachea? The inner surface of the trachea is lined with a respiratory epithelium consisting of ciliated epithelial cells, brush cells and goblet cells. The goblet cells, together with glands, secrete a secretion that creates a mucus film on the surface that binds suspended particles and … Trachea: Function, Anatomy, Diseases
What is the lung? The lung is the organ of the body in which oxygen is absorbed into the blood from the air we breathe and carbon dioxide is released from the blood into the air. It consists of two wings of unequal size, the left of which is slightly smaller to allow room for … 1. Lung: Function, Anatomy, Diseases
What is the midbrain? The midbrain (mesencephalon) is a part of the brainstem in the brain. Among other things, it is responsible for the control of coordination. In addition, it plays an important role for hearing and seeing, but also for the sensation of pain. The midbrain consists of different parts: Towards the back (dorsal) … Midbrain (Mesencephalon): Anatomy & Function
What is the wrist joint? The wrist is a two-part joint: The upper part is an articulated connection between the forearm bone radius and the three carpal bones scaphoid, lunate and triangular. An interarticular disc (discus triangularis) between the radius and ulna (the second forearm bone) is also involved. The ulna itself is not connected … Wrist: Function, Anatomy and Disorders
What is the cerebrum? The cerebrum or endbrain makes up the main part of the human brain. It consists of a right and a left half (hemisphere), the two connected by the bar (corpus callosum). Apart from the bar, there are other (smaller) connections (commissures) between the two halves of the brain. External division of … Cerebrum: Function, Structure, Damages
