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@Heart -- #Media/News Company
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The heart is a muscular organ in humans and other animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, as well as assists in the removal of metabolic wastes. In humans, the heart is located between the lungs, in the middle compartment of the chest.In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.
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@Penis -- #Sex Therapist
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De penis, piemel of het lid is het mannelijk geslachtsorgaan, dat gebruikt wordt om urine te lozen en voor het uitvoeren van seksuele handelingen, waaronder geslachtsgemeenschap, al of niet voor voortplanting.Functies van de penisUrinerenEen vitale functie van de penis is urineren, het afvoeren van afvalstoffen in de waterige drager urine. Wanneer de blaas meer dan een bepaalde hoeveelheid urine bevat, ontstaat het plasgevoel, dat opgeheven wordt door het lozen van de urine via de urinebuis die door de penis loopt.GeslachtsgemeenschapBij geslachtsgemeenschap wordt de stijve penis gebruikt voor vaginale penetratie. Als de penis niet stijf kan worden, waardoor penetratie onmogelijk is, dan is voortplanting op natuurlijke wijze niet mogelijk. De eikel speelt een belangrijke rol bij het opwekken van een orgasme, dat op zijn beurt weer een ejaculatie op gang brengt, waarbij sperma naar buiten wordt gebracht.Het lozen van sperma gebeurt via de urinebuis. Om te voorkomen dat er urine tijdens de zaadlozing naar buiten komt, zwelt de prostaat vlak voor de zaadlozing op, waardoor de urinewegen geblokkeerd worden.EtymologieHet woord "penis" komt van het Latijnse woord voor staart. Sommigen denken dat komt van het Indo-Europese woord pesnis of via het Griekse woord πεος = "penis" van Indo-Europese pesos.
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@Nose -- #Interest
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Anatomically, a nose is a protuberance in vertebrates that houses the nostrils, or nares, which receive and expel air for respiration alongside the mouth. Behind the nose are the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system. In humans, the nose is located centrally on the face and serves as an alternative respiratory passage especially during suckling for infants. On most other mammals, it is located on the upper tip of the snout.Air treatmentActing as the first interface between the external environment and an animal´s delicate internal lungs, a nose conditions incoming air, both as a function of thermal regulation and filtration during respiration, as well as enabling the sensory perception of smell.Hair inside nostrils filter incoming air, as a first line of defense against dust particles, smoke, and other potential obstructions that would otherwise inhibit respiration, and as a kind of filter against airborne illness. In addition to acting as a filter, mucous produced within the nose supplements the body´s effort to maintain temperature, as well as contributes moisture to integral components of the respiratory system. Capillary structures of the nose warm and humidify air entering the body; later, this role in retaining moisture enables conditions for alveoli to properly exchange O2 for CO2 (i.e., respiration) within the lungs. During exhalation, the capillaries then aid recovery of some moisture, mostly as a function of thermal regulation, again.
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@Middle finger -- #Interest
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The middle finger, long finger, or tall finger is the third digit of the human hand, located between the index finger and the ring finger. It is usually the longest finger. In anatomy, it is also called the third finger, digitus medius, digitus tertius, or digitus III.In Western countries, extending the middle finger (either by itself, or along with the index finger in the United Kingdom: see V sign) is an offensive and obscene gesture, widely recognized as a form of insult (colloquially known as "flipping the bird", "flipping someone off", or simply "giving the finger").The middle finger is often used for finger snapping together with the thumb.
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@Gebein -- #Interest
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Knochen sind druck- und zugfeste Organe, aus denen die Endoskelette der Wirbeltiere bestehen. Das menschliche Skelett besteht aus etwa 205 Knochen. Die Anzahl variiert, da unterschiedlich viele Kleinknochen in Fuß und Wirbelsäule vorhanden sein können. Kleine Knochen, beispielsweise akzessorische Knochen in Hand- oder Fußwurzel, werden oft als Ossikel bezeichnet.Knochen sind Teil des Stütz- und Bewegungsapparats und werden dem passiven Bewegungsapparat zugerechnet. Die einzelnen Knochen sehen je nach Lage und Funktion unterschiedlich aus. Gleichzeitig schützen die Knochen innere Organe, wie die Schädelknochen das Gehirn und der Brustkorb das Herz und die Lunge. Außerdem bilden sich im roten Knochenmark die roten Blutkörperchen, die Blutplättchen und die weißen Blutkörperchen. Die Größe variiert zwischen den nur millimetergroßen Gehörknöchelchen einiger Kleinsäuger bis zu den meterlangen Bein- und Rippenknochen der Dinosaurier.
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@Urinary system -- #Interest
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The urinary system, also known as the renal system, consists of the kidneys, ureters, bladder, and the urethra. Each kidney consists of millions of functional units called nephrons. The purpose of the renal system is to eliminate wastes from the body, regulate blood volume and blood pressure, control levels of electrolytes and metabolites, and regulate blood pH. The kidneys have an extensive blood supply via the renal arteries which leave the kidneys via the renal vein. Following filtration of blood and further processing, wastes (in the form of urine) exit the kidney via the ureters, tubes made of smooth muscle fibers that propel urine towards the urinary bladder, where it is stored and subsequently expelled from the body by urination (voiding). The female and male urinary system are very similar, differing only in the length of the urethra.Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body.8002,000 milliliters (mL) of urine are normally produced every day in a healthy human. This amount varies according to fluid intake and kidney function.StructureThe urinary system refers to the structures that produce and conduct urine to the point of excretion. The human body normally has two paired kidneys, one on the left and one on the right. Urine is formed by nephrons, the functional unit of the kidney, and then flows through a system of converging tubules called collecting ducts. The collecting ducts join together to form minor calyces, then major calyces, which ultimately join the pelvis of the kidney (renal pelvis). Urine flows from the renal pelvis into the ureter, a tube-like structure that carries the urine from the kidneys into the bladder.
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@Urinary bladder -- #Interest
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The urinary bladder is a hollow muscular organ in many animals, that collects and stores urine from the kidneys before disposal by urination. In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra. The typical human bladder can hold between 300 and before the urge to empty occurs, but can hold considerably more.StructureIn the human, the bladder is a hollow muscular organ situated at the base of the pelvis. Urine collects in the bladder, fed from the two ureters that are connected to the kidneys. Urine leaves the bladder via the urethra, a single muscular tube which ends in an opening – the urinary meatus, where it exits the body.Anatomically, the bladder is divided into a broad fundus, a body, an apex, and a neck. The apex (prev.vertex) is directed forward toward the upper part of the pubic symphysis, and from there the middle umbilical ligament is continued upward on the back of the anterior abdominal wall to the umbilicus. The peritoneum is carried by it from the apex on to the abdominal wall to form the middle umbilical fold. The neck of the bladder is the area at the base of the trigone that surrounds the internal urethral orifice that leads to the urethra. In the male the neck of the urinary bladder is adjacent to the prostate gland.
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@Hairy Armpits -- #Interest
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The axilla is the area on the human body directly under the joint where the arm connects to the shoulder. It also provides the under-arm sweat gland.In humans, the formation of body odor happens mostly in the axillary region. These odorant substances serve as pheromones which play a role related to mating. The underarm regions seem more important than the genital region for body odor which may be related to human bipedalism.StructureBoundariesAnatomically, the boundaries of the axilla are:The lower posterior boundary is called the posterior axillary fold and this is a compound structure consisting of the latissimus dorsi and teres major muscles.It can descend after weight loss.The anterior boundary is called the anterior axillary fold and this is rounded in shape and formed by the lower border of the pectoralis major. Some sources also include the pectoralis minor.It can elongate after weight loss.The contents of the axilla include the axillary vein and artery, as well as the brachial plexus, lymph nodes and fat. The axilla is the space between the side of the thorax and the upper arm.Contents Axillary artery and its branches Axillary vein and its tributaries Infraclavicular part of the brachial plexus Long thoracic and intercostobrachial nerves Five groups of axillary lymph nodes and the associated lymphatics Axillary fat and areolar tissue in which the other contents are embedded
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@Poumon -- #Interest
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Le est un organe invaginé permettant d´échanger des gaz vitaux, notamment l´oxygène et le dioxyde de carbone. L´oxygène est nécessaire au métabolisme de l´organisme, et le dioxyde de carbone doit être évacué.Anatomie humaineMorphologieL´homme possède deux poumons, gauche et droit, deux organes thoraciques, séparés l´un de l´autre, au centre, par le médiastin. Ils sont posés sur le diaphragme et protégés par la cage thoracique en avant, en dehors et en arrière, sauf au niveau de leur sommet, car ils dépassent ventralement le bord supérieur de la première côte, et montent même jusqu´au-dessus de la clavicule, à la base du cou, dans le creux supraclaviculaire.Segmentation pulmonaireLe poumon droit est divisé en trois lobes, le gauche divisé en deux . À gauche, la partie lingulaire du lobe supérieur correspond au lobe moyen droit, tandis que la partie culminale correspond au lobe supérieur droit. Les lobes sont séparés par des scissures, deux à droite et une à gauche .Chaque lobe des poumons est divisé en segments pulmonaires :Circulation pulmonaireLa vascularisation pulmonaire artérielle est double : le système pulmonaire et bronchique. Les artères pulmonaires apportent le sang veineux du ventricule droit pour l´oxygénation, leur parcours suivant les bronches. Les artères bronchiques proviennent de l´aorte ou des artères intercostales et apportent le sang oxygéné à la paroi bronchique au niveau des bronchioles terminales.
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@Organelle -- #Interest
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In cell biology, an organelle is a specialized subunit within a cell that has a specific function. Individual organelles are usually separately enclosed within their own lipid bilayers.The name organelle comes from the idea that these structures are a part of cells, like what an organ is to the body (hence the name organelle, the suffix -elle being a diminutive). Organelles are identified by microscopy, and can also be purified by cell fractionation. There are many types of organelles, particularly in eukaryotic cells. While prokaryotes do not possess organelles per se, some do contain protein-based bacterial microcompartments, which are thought to act as primitive organelles.History and terminologyIn biology organs are defined as confined functional units within an organism. The analogy of bodily organs to microscopic cellular substructures is obvious, as from even early works, authors of respective textbooks rarely elaborate on the distinction between the two.In the 1830s, Félix Dujardin refuted Ehrenberg theory which said that microorganims have the same organs of multicellular animals, only minor.
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