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Topic: Diaphragm (anatomy)

  Diaphragm (anatomy) - MSN Encarta
Diaphragm (anatomy), wide muscular partition separating the thoracic, or chest cavity, from the abdominal cavity.
In humans the diaphragm is attached to the lumbar vertebrae, the lower ribs, and the sternum or breastbone.
A hiccup is caused by a spasmodic, involuntary contraction of the diaphragm.
encarta.msn.com /encyclopedia_761570683/Diaphragm_(anatomy).html   (169 words)

 Diaphragm (anatomy) Summary
The Diaphragm is a dome-shaped musculofibrous septum which separates the thoracic from the abdominal cavity, its convex upper surface forming the floor of the former, and its concave under surface the roof of the latter.
The central tendon of the diaphragm is a thin but strong aponeurosis situated near the center of the vault formed by the muscle, but somewhat closer to the front than to the back of the thorax, so that the posterior muscular fibers are the longer.
The diaphragm is pierced by a series of apertures to permit of the passage of structures between the thorax and abdomen.
www.bookrags.com /Diaphragm_(anatomy)   (2251 words)

 IV. Myology. 6c. The Muscles of the Thorax. Gray, Henry. 1918. Anatomy of the Human Body.
The central tendon applied to the abdominal viscera then becomes a fixed point for the action of the diaphragm, the effect of which is to elevate the lower ribs and through them to push forward the body of the sternum and the upper ribs.
The right cupola of the diaphragm, lying on the liver, has a greater resistance to overcome than the left, which lies over the stomach, but to compensate for this the right crus and the fibers of the right side generally are stronger than those of the left.
The height of the diaphragm is constantly varying during respiration; it also varies with the degree of distension of the stomach and intestines and with the size of the liver.
www.bartleby.com /107/117.html   (3245 words)

  Learn more about Anatomy in the online encyclopedia.   (Site not responding. Last check: )
Anatomy (from the Greek anatome, from ana-temnein, to cut up), is the branch of biology that deals with the structure and organization of living things; thus there is animal anatomy (zootomy) and vegetable anatomy (phytotomy).
Animal anatomy may include the study of the structure of different animals, when it is called comparative anatomy or animal morphology, or it may be limited to one animal only, in which case it is spoken of as special anatomy.
From the morphological point of view, however, human anatomy is a scientific and fascinating study, having for its object the discovery of the causes which have brought about the existing structure of Man, and needing a knowledge of the allied sciences of embryology or ontogeny, phylogeny, and histology.
www.onlineencyclopedia.org /a/an/anatomy.html   (612 words)

 The Ultimate Diaphragm (anatomy) - American History Information Guide and Reference
It is critically important in respiration: in order to draw air into the lungs, the diaphragm contracts, thus enlarging the thoracic cavity and reducing intra-thoracic pressure.
A hiatal hernia is a tear in the diaphragm.
There are three main apertures (or holes) in the diaphragm, one each for the inferior vena cava (the Foramen Venae Cavae), aorta (the Hiatus Aorticus) and oesophagus.
www.historymania.com /american_history/Diaphragm_(anatomy)   (237 words)

 AllRefer.com - diaphragm (Anatomy And Physiology) - Encyclopedia
In humans, the thoraco-abdominal diaphragm acts as a partition between the cavity of the chest and that of the abdomen.
The thoraco-abdominal diaphragm is also subject to developmental defects, hernia, injury, displacement, and infection.
Other diaphragms in the human body include the pelvic diaphragm and the urogenital diaphragm, which use similar muscular contractions and expansions in their respective functions.
reference.allrefer.com /encyclopedia/D/diaphrag.html   (0 words)

In anatomy, the diaphragm is a shelf of muscle extending across the bottom of the ribcage, providing the floor to the thoracic cavity and the ceiling to the abdominal cavity.
A diaphragm is a sheet of a semi-flexible material, anchored at its periphery, and most often round in shape.
It serves either as a barrier between two chambers, moving slightly up into one chamber or down into the other depending on differences in pressure, or as a device that vibrates when certain frequencies are somehow applied to it.
www.ebroadcast.com.au /lookup/encyclopedia/di/Diaphragm.html   (158 words)

 USNews.com: Health: GERD: Need-to-know anatomy
The esophagus passes through the hiatus, an opening in the diaphragm, to join up with the stomach in the abdominal cavity at the lower esophageal sphincter.
The diaphragm muscle contracts and helps to enhance the strength of the lower esophageal sphincter, which creates a barrier to the transfer of stomach contents back into the esophagus.
Sometimes a weakening of the diaphragm muscle at the hiatus will cause the top part of the stomach to slip through the hiatus into the chest, and this is called a hiatal hernia.
www.usnews.com /usnews/health/digestive-diseases/gerd/gerd.about.anatomy.htm   (348 words)

 Anatomy of a Fountain Pen II: The Parker Vacumatic
To install the diaphragm, a small tool is used to push the pellet into the hole at the end of the tubular aluminum plunger.
The rubber of the diaphragm is stretched so that it will fit through the hole, which is just small enough to keep the pellet from popping out when the rubber is not being stretched.
After the diaphragm is in place, the filler unit is inserted into the back end of the barrel and secured by the retaining collar.
www.richardspens.com /ref_info/anatomy-vac.htm   (811 words)

 Diaphragm with spermicide   (Site not responding. Last check: )
The diaphragm and the spermicide form a barrier that keeps sperm from entering the uterus and proceeding up into the Fallopian tubes to fertilize an egg.
The diaphragm is a barrier method, which means that unless a woman is allergic to latex or the ingredients in spermicide, she should not have any systemic side effects.
The diaphragm must be used at the time of intercourse, although it can be worn for a total of 24 hours.
scc.uchicago.edu /diaphragm.htm   (827 words)

 eMedicine - Diaphragm Disorders : Article Excerpt by: Jason M Johnson, DO
Anatomic disorders decrease the integrity of the musculature of the diaphragm, thus decreasing its excursion.
The diaphragm is a modified half dome of musculofibrous tissue that separates the thorax from the abdomen.
The muscular origin of the diaphragm is from the lower 6 ribs bilaterally, the posterior xiphoid process, and from the external and internal arcuate ligaments.
www.emedicine.com /med/byname/diaphragm-disorders.htm   (606 words)

 Chapter 37: The pelvic diaphragm and fascia
The pelvic diaphragm is a muscular partition formed by the levatores ani and coccygei, with which may be included the parietal pelvic fascia on their upper and lower aspects.
The pelvic diaphragm is supplied chiefly by the ventral rami of S.N. The diaphragm helps to support the pelvic viscera, resists increases in intra-abdominal pressure, and aids in micturition.
It contributes to the floor of the pelvis as the superior and inferior fasciae of the pelvic diaphragm, and it lines the lateral pelvic wall as the obturator fascia.
www.dartmouth.edu /~humananatomy/part_6/chapter_37.html   (641 words)

 [No title]
Before considering the anatomy of the pelvis itself, however, it will be appropriate to briefly consider the relationship of the pelvis to the adjoining regions of the body: the abdominal cavity and the lower limb.
The urogenital diaphragm consists of 3 layers: an inferior layer of fascia, known as the perineal membrane; a muscle laver, containing the sphincter urethrae (which acts as a voluntary sphincter for the urethra) and deep transverse perineal muscles; and a superior layer of fascia.
The membranous fascia fuses with the superficial fascia of the urogenital diaphragm (perineal membrane) at its posterior border.
www.emory.edu /ANATOMY/AnatomyManual/pelvis.html   (9319 words)

 XI. Splanchnology. 2d. The Esophagus. Gray, Henry. 1918. Anatomy of the Human Body.
It is the narrowest part of the digestive tube, and is most contracted at its commencement, and at the point where it passes through the diaphragm.
The thoracic portion of the esophagus is at first situated in the superior mediastinum between the trachea and the vertebral column, a little to the left of the median line.
On its left side, in the superior mediastinum, are the terminal part of the aortic arch, the left subclavian artery, the thoracic duct, and left pleura, while running upward in the angle between it and the trachea is the left recurrent nerve; below, it is in relation with the descending thoracic aorta.
www.bartleby.com /107/245.html   (958 words)

During inhalation, the inspiratory intercostals and the diaphragm are contracted, expanding the lungs.
As the diaphragm is connected with the upper abdominal wall, its contraction moves the abdominal walls outwards.
On the other hand, during exhalation the rise in the abdominal muscles pulls up the diaphragm, and within the contraction of the expiratory intercostals the lung volume is reduced by expelling air.
www.shef.ac.uk /janedavidson/anatomy.html   (548 words)

 Medical Dictionary: Diaphragm - WrongDiagnosis.com - WrongDiagnosis.com
Diaphragm : musculofibrous partition that separates the thoracic cavity from the abdominal cavity; contraction of the diaphragm increases the volume of the thoracic cavity aiding inspiration.
Diaphragm (organ): The diaphragm is the large muscle that we use to help in breathing.
The diaphragm is a large muscle between the chest and abdomen.
www.wrongdiagnosis.com /medical/diaphragm_printer.htm   (289 words)

 Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System: Alphabetical Listing of ...
The sternal portion of the diaphragm may be absent, and its costal origins may extend from the sixth or even the fifth rib.
In such cases, it may be noted that the lumbar portion of the diaphragm extends anteroposteriorly on the medial side of the aperture.
Latta, J.S. (1922) Congenital Deficiency of the diaphragm.
www.anatomyatlases.org /AnatomicVariants/MuscularSystem/Text/D/04Diaphragm.shtml   (625 words)

 The Diaphragm
The diaphragm, viewed from above at left with the front of the body on top, is a sheet of muscle and tendon the divides that torso in two.
The diaphragm features a boomerang shaped central tendon which is connected all around by muscular fibers which originate on the lumbar spine,the bottom edge of the ribcase and sternum.
Also noticeable is the double dome effect of the diaphragm, where the diaphragm is higher on the right side than the left, allowing the liver to be tucked up under the bottom edge of the right ribcase, while the left is lower, allowing more room for the heart.
www.yorku.ca /earmstro/journey/diaphragm.html   (299 words)

 Contraception - Birth control. Barrier methods (condoms, diaphragm, cervical cap)   (Site not responding. Last check: )
The diaphragm is a method of birth control used by a woman.
To protect it from damage, the diaphragm should be carried in its case, which is roughly 5.8 inches and fits into a large purse.
On the other hand, the diaphragm is a good method of birth control for the woman who should not use hormonal methods because of health reasons — such as a heart problem or smoking habit.
www.arborita.lt /EN/Medical/Contraception/barrier-contraception-EN.htm   (1108 words)

 Diaphragm – a skeletal muscle sheet   (Site not responding. Last check: )
The word diaphragm literally means, dia that is across, and phragm means wall It is a muscular fibrous partition separating the abdominal and thoracic cavities.
The diaphragm, a skeletal muscle, is very useful in breathing and thus in maintaining our life on a minute to minute basis.
The diaphragm is also important in performing such actions as blowing out the air, laughing, singing, whistling, crying, yawning, coughing, sneezing, vomiting, defecating, urinating, and in parturition i.e.
www.suite101.com /article.cfm/our_beautiful_bodies/98234   (416 words)

 Respiratory System/Pulmonary Anatomy - PulmonologyChannel
The bottom, or base, of each lung extends down to the diaphragm, which is the major breathing-associated muscle that separates the chest from the abdominal cavity.
The major respiratory muscle is the diaphragm, a large muscular partition that separates the chest cavity from the abdominal cavity.
The diaphragm receives its nerve supply from the phrenic nerves, which descend from the upper neck.
www.pulmonologychannel.com /anatomy.shtml   (1382 words)

 Olympus Microscopy Resource Center: Anatomy of the Microscope
There are two major types of eyepieces that are grouped according to lens and aperture diaphragm arrangement: the negative eyepieces with an internal diaphragm and positive eyepieces that have a diaphragm below the lenses of the eyepiece.
They are often forced to assume an awkward work posture such as the head bent over the eye tubes, the upper part of the body bent forward, the hand reaching high up for a focusing control, or with the wrists bent in an unnatural position.
Microscope Anatomy Interactive Java Tutorials - We have constructed a variety of interactive Java-driven microscopy tutorials to help explain some of the more difficult concepts in optical microscopy.
www.olympusmicro.com /primer/anatomy/anatomy.html   (1857 words)

 human anatomy resources - anatomical models and charts.
Welcome to one stop shopping for your human anatomy education needs.
We recognize that such needs cover an entire spectrum: introduction to anatomy for elementary school children, more advanced studies for those in middle and high school and, course, college and medical school.
Some also show heart, pulmonary arties and veins, esophagus and diaphragm.
www.microscope.org /human-anatomy/sh000.htm   (390 words)

 Instant Anatomy - Podcasts
Podcast 35 is the second of two parts covering surface anatomy.
Podcast 24 is the first in the series on the abdomen, covering the surface anatomy and the peritoneum.
Podcast 22 is on Respiration and the Diaphragm.
www.instantanatomy.net /podcasts.html   (2503 words)

 Diaphragm (anatomy)
Trial Examines Diaphragm Use In Preventing HIV In Women (July 16, 2007) — A clinical trial involving 5,045 women in South Africa and Zimbabwe found no statistical difference in the rate of new HIV infections in the two study arms: those who received a diaphragm plus...
Understanding And Treating Congenital Diaphragmatic Hernia (June 12, 2007) — Four new reviews shed light on CHD by describing the diversity of the condition, exploring potential ways of treating it, using animal models to discover which genes play a role in diaphragm...
Radical Surgery Best Option For Most Ovarian Cancer Patients With Cancer In Diaphragm (October 13, 2005) — Mayo Clinic Cancer Center researchers have determined that surgery to remove metastatic disease from the diaphragm, in conjunction with other procedures to remove the primary diseased tissue in...
www.sciencedaily.com /articles/d/diaphragm_(anatomy).htm   (593 words)

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