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Encyclopedia > Sphincter ani internus muscle
Sphincter ani internus muscle
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The Sphincter ani internus muscle is a muscle of the human body. A typical adult human skeleton consists of the following 206 bones. ... A typical adult human skeleton consists of the following 206 bones. ... List of blood vessels This is an incomplete list, which can or may never satisfy any subjective standard for completeness. ... A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... Human anatomy or anthropotomy is a special field within anatomy. ...


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Muscles of the Head -- Neck -- Trunk -- Upper limb -- Lower limb -- LIST OF ALL MUSCLES

BACK: interspinales | intertransversarii | multifidus | rotatores | sacrospinalis | semispinalis | splenius capitis | splenius cervicis A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... This is a list of muscles of the human anatomy. ... Look up Back on Wiktionary, the free dictionary In anatomy, the back usually refers to the posterior side of the torso in humans and other primates. ... these muscles sometimes hurt me. ... Intertransversarii muscles The Intertransversarii are small muscles placed between the transverse processes of the vertebræ. In the cervical region they are best developed, consisting of rounded muscular and tendinous fasciculi, and are placed in pairs, passing between the anterior and the posterior tubercles respectively of the transverse processes of two... The Multifidus muscle is a muscle of the human body. ... The Rotatores muscle is a muscle of the human body. ... The Sacrospinalis muscle is a muscle of the human body. ... The Semispinalis muscle is a muscle of the human body. ...


SUBOCCIPITAL : obliquus capitis (inferior, superior) | rectus capitis posterior (major, minor) The first spinal nerve, the suboccipital nerve exits the spinal cord between the skull and the first cervical vertebra, the atlas. ... In anatomy, the obliquus capitis inferior muscle, the larger of the two oblique muscles, is one of the muscles of the neck. ... It arises from the lateral mass of the atlas bone. ... The Rectus capitis posterior major muscle is a muscle of the human body. ... The Rectus capitis posterior minor muscle is a muscle of the human body. ...


THORAX: diaphragm | intercostales (externi, interni) | levatores costarum | serratus posterior (inferior, superior) | subcostales | transversus thoracis Diagram of a tsetse fly, showing the head, thorax and abdomen The thorax is a division of an animals body that lies between the head and the abdomen. ... Under surface of the human diaphragm. ... The Intercostales externi muscle is a muscle of the human body. ... The Intercostales interni muscle is a muscle of the human body. ... The Levatores costarum, twelve in number on either side, are small tendinous and fleshy bundles, which arise from the ends of the transverse processes of the seventh cervical and upper eleven thoracic vertebrae; they pass obliquely downward and lateralward, like the fibers of the Intercostales externi, and each is inserted... The Serratus posterior inferior muscle is a muscle of the human body. ... The Serratus posterior superior muscle is a muscle of the human body. ... The tranversus thoracis lies internal to the thoracic cage, anteriorly. ...


ABDOMEN: cremaster | obliques (external, internal) | psoas (major, minor) | pyramidalis | quadratus lumborum | rectus abdominis | transversus abdominis The human abdomen Footballer John Arne Riise flashing his abdominals The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ... The cremaster muscle appears as a thin layer just superficial to the tunica vaginalis. ... The Obliquus externus abdominis muscle (or external oblique) is a muscle of the human body. ... The internal oblique is the intermediate muscle of the abdomen, lying just underneath the external oblique and just above (superficial to) the transverse abdominal muscle. ... This page is a candidate for speedy deletion. ... The Psoas minor muscle is a muscle of the human body. ... This page is a candidate for speedy deletion. ... The Quadratus lumborum muscle is a muscle of the human body. ... Rectus abdominis The rectus abdominis muscle is a paired muscle running vertically on each side of the anterior wall of the human abdomen (and in some animals). ... The transversus abdominis muscle, also known as the transverse abdominal muscle, is a muscle layer of the anterior and lateral abdominal wall which is deep to the internal oblique muscle. ...


PELVIS: pubococcygeus | levator ani The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ... The pubococcygeus muscle or PC muscle is an important muscle in the human body. ... The Levator ani is a broad, thin muscle, situated on the side of the pelvis. ...


PERINEUM: bulbospongiosus | corrugator cutis ani | ischiocavernosus | sphincter ani (externus, internus) | sphincter urethrae membranaceae | transversus perinei (profundus, superficialis) The muscles of the male perineum In anatomy, the perineum is the region between the genital area and the anus in both sexes. ... Bulbospongiosus is one of the superficial muscles of the perineum. ... The Corrugator cutis ani muscle is a muscle of the human body. ... The ischiocavernosus muscle is a muscle just below the surface of the perineum, present in both men and women. ... The Sphincter ani externus muscle is a muscle of the human body. ...


  Results from FactBites:
 
Sphincter ani internus muscle - Wikipedia, the free encyclopedia (186 words)
The Sphincter ani internus (or internal anal sphincter) is a muscular ring which surrounds about 2.5 cm.
of the anal canal; its inferior border is in contact with, but quite separate from, the Sphincter ani externus.
It helps the Sphincter ani externus to occlude the anal aperture and aids in the expulsion of the feces.
IV. Myology. 6e. The Muscles and Fasciæ of the Pelvis. Gray, Henry. 1918. Anatomy of the Human Body. (1653 words)
The muscles within the pelvis may be divided into two groups: (1) the Obturator internus and the Piriformis, which are muscles of the lower extremity, and will be described with these (pages 476 and 477); (2) the Levator ani and the Coccygeus, which together form the pelvic diaphragm and are associated with the pelvic viscera.
In the female the anterior fibers of the Levator ani descend upon the side of the vagina.
—The Levator ani is supplied by a branch from the fourth sacral nerve and by a branch which is sometimes derived from the perineal, sometimes from the inferior hemorrhoidal division of the pudendal nerve.
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