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Encyclopedia > Iliac crest
Human male pelvis, viewed from front
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Human male pelvis, viewed from front
Human female pelvis, viewed from front
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Human female pelvis, viewed from front

The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). The pelvis incorporates the socket portion of the hip joint for each leg (in bipeds) or hind leg (in quadrupeds). It forms the lower limb (or hind-limb) girdle of the skeleton. Grays illustration of a human femur, a typically recognized bone. ... The vertebral column seen from the side The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... Bones of the Hip In anatomy, the hip is the bony projection of the femur, known as the greater trochanter, and the overlying muscle and fat. ... A quadruped is an animal having exactly four walking legs. ... In humans, the lower limb is an anatomical term for the limb that is attached to the pelvic girlde, what is commonly referred to as the leg. ... In biology, the skeleton or skeletal system is the biological system providing support in living organisms. ...


The pelvis is symmetrical and each side is actually made up of three separate bones — the upper half (the broad "wings") is the ilium; the middle (the top half of the lower "loops") is the pubis, and the bottom (the lower half of the "loops") is the ischium. These three bones fuse together with age and are collectively known as the hip bone, ossa coxae or the innominate bone. The pelvis is joined to the sacrum bone by ligaments (the sacroiliac joint), and the hip bones nest in specially shaped sockets (the acetabulum) on each side. The upper edge of the ilium is known as the iliac crest. The place at the front of the pelvis where the two sides join together is called the symphysis pubis. This is normally a very inflexible joint, but it softens and becomes more flexible during late pregnancy, allowing it to expand during labour for the baby's head to pass through. A female pelvis is also wider and shallower than a male pelvis. Sacrum, pelvic surface The sacrum (os sacrum) is a large, triangular bone at the base of the vertebral column and at the upper and back part of the pelvic cavity, where it is inserted like a wedge between the two hip bones. ... A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen fibres. ... The sacroiliac joint is a part of the body—supposedly a joint—in the lower area of the spinal cord. ... Bones of the Hip In anatomy, the hip is the bony projection of the femur, known as the greater trochanter, and the overlying muscle and fat. ... Categories: Anatomy stubs | Skeletal system ... The pubic symphysis is the midline cartilaginous joint uniting the superior rami of the left and right pubic bones (pubis). ...


A well-known way of determining the sex of a pelvis is to compare the angle of the width of the frontal opening to one's hand. If the angle is about the same as between the outstretched thumb and index finger, it is a female pelvis (arcus pubis). If it is closer to the angle between the spread index and middle fingers, it is a male pelvis (arcus subpubis).


The pelvis protects the digestive and reproductive organs in the lower part of the body, and many large nerves and blood vessels pass through it to supply the legs. It is also an important load-bearing part of the skeletal system. For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis...


See also


The renal pelvis is a structure found at the junction of the mammalian kidney and ureter. Grays illustration of a human femur, a typically recognized bone. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... A break in the femur just below the pelvis; approximately 320,000 hospitalizations occur each year due hip fractures. ... The renal pelvis represents the dilated proximal part of the ureter. ... Orders Subclass Monotremata Monotremata Subclass Marsupialia Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Subclass Placentalia Xenarthra Dermoptera Desmostylia Scandentia Primates Rodentia Lagomorpha Insectivora Chiroptera Pholidota Carnivora Perissodactyla Artiodactyla Cetacea Afrosoricida Macroscelidea Tubulidentata Hyracoidea Proboscidea Sirenia The mammals are the class of vertebrate animals characterized by the presence of mammary glands... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... Transverse section of ureter. ...


  Results from FactBites:
 
Thoracolumbar junction: Maigne syndrome (1423 words)
The iliac insertion of the iliolumbar ligament is inaccessible to palpation, being shielded by the iliac crest.
Thus, it can be seen that posterior iliac crest tenderness may correspond either to the insertion of the iliolumbar ligament or to the cutaneous dorsal rami that cross the posterior iliac crest and originate at the thoracolumbar junction.
Similar observations were made by Luk and colleagues, who noticed that the ligament blended with the periosteum of the ventral margin of the iliac crest, and by Gray, who said the insertion of the ligament was on the crest in front of the sacroiliac joint.
IV. Myology. 8. The Muscles and Fasciæ of the Lower Extremity. a. The Muscles and Fasciæ of the Iliac Region. ... (1005 words)
The portions investing the Iliacus (fascia iliaca; iliac fascia) is connected, laterally to the whole length of the inner lip of the iliac crest; and medially, to the linea terminalis of the lesser pelvis, where it is continuous with the periosteum.
The external iliac vessels lie in front of the iliac fascia, but all the branches of the lumbar plexus are behind it; it is separated from the peritoneum by a quantity of loose areolar tissue.
It arises from the upper two-thirds of this fossa, and from the inner lip of the iliac crest; behind, from the anterior sacroiliac and the iliolumbar ligaments, and base of the sacrum; in front, it reaches as far as the anterior superior and anterior inferior iliac spines, and the notch between them.
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