Acetabulum - wikipedia Acetabulum This article is about the human anatomical region. For the Ancient Roman vessel, see Acetabulum ( cup ). For the unit of measure, see Acetabulum ( unit ). For the invertebrate organ, see Acetabulum ( morphology ). Not to be confused with Acetabularia. Acetabulum of pelvis Pelvic girdle The acetabulum Details Identifiers Latin Acetabulum MeSH A02. 835.232. 611.108 Dorlands / Elsevier a_06 / 12104853 TA A02. 5.01. 002 FMA 16579 Anatomical terms of bone ( edit on Wikidata ) The acetabulum / æsəˈtæbjʊləm / ( cotyloid cavity ) is a concave surface of a pelvis. The head of the femur meets with the pelvis at the acetabulum, forming the hip joint. Contents 1 Structure 1.1 Blood supply 1.2 Reptiles and birds 2 Development 3 History 4 Additional images 5 References 6 External links Structure There are three bones of the os coxae ( hip bone ) that come together to form the acetabulum. Contributing a little more than two - fifths of the structure is the ischium, which provides lower and side boundaries to the acetabulum. The ilium forms the upper boundary, providing a little less than two - fifths of the structure of the acetabulum. The rest is formed by the pubis, near the midline. It is bounded by a prominent uneven rim, which is thick and strong above, and serves for the attachment of the acetabular labrum, which reduces its opening, and deepens the surface for formation of the hip joint. At the lower part of the acetabulum is the acetabular notch, which is continuous with a circular depression, the acetabular fossa, at the bottom of the cavity of the acetabulum. The rest of the acetabulum is formed by a curved, crescent - moon shaped surface, the lunate surface, where the joint is made with the head of the femur. Its counterpart in the pectoral girdle is the glenoid fossa. The acetabulum is also home to the acetabular fossa, an attachment site for the ligamentum teres, a triangular, somewhat flattened band implanted by its apex into the antero - superior part of the fovea capitis femoris. The notch is converted into a foramen by the transverse acetabular ligament ; through the foramen nutrient vessels and nerves enter the joint. This is what holds the head of the femur securely in the acetabulum. The well - fitting surfaces of the femoral head and acetabulum, which face each other, are lined with a layer of slippery tissue called articular cartilage, which is lubricated by a thin film of synovial fluid. Friction inside a normal hip is less than one - tenth that of ice gliding on ice. Blood supply The acetabular branch of the obturator artery supplies the acetabulum through the acetabular notch. The pubic branches supply the pelvic surface of the acetabulum. Deep branches of the superior gluteal artery supply the superior region and the inferior gluteal artery supplies the postero - inferior region. Reptiles and birds An example of a perforated acetabulum on an ornithischian dinosaur. In reptiles and birds, the acetabula are deep sockets. Organisms in the dinosauria clade are defined by a perforate acetabulum, which can be thought of as a `` hip - socket ''. The perforate acetabulum is a cup - shaped opening on each side of the pelvic girdle formed where the ischium, ilium, and pubis all meet, and into which the head of the femur inserts. The orientation and position of the acetabulum is one of the main morphological traits that caused dinosaurs to walk in an upright posture with their legs directly underneath their bodies. In a relatively small number of dinosaurs, particularly ankylosaurians ( e.g. Texasetes pleurohalio ), an imperforate acetabulum is present, which is not an opening, but instead resembles a shallow concave depression on each side of the pelvic girdle. Development In infants and children, a ' Y ' - shaped epiphyseal plate called the triradiate cartilage joins the ilium, ischium, and pubis. This cartilage ossifies as the child grows. History The word acetabulum literally means `` little vinegar cup ''. It was the Latin word for a small vessel for serving vinegar. The word was later also used as a unit of volume. Additional images Right hip bone. External surface. Plan of ossification of the hip bone. Symphysis pubis exposed by a coronal section. Left hip - joint, opened by removing the floor of the acetabulum from within the pelvis. Hip - joint, front view. Capsule of hip - joint ( distended ). Posterior aspect. Structures surrounding right hip - joint. Acetabulum Hip joint. Lateral view. Acetabulum Hip joint. Lateral view. Acetabulum References This article incorporates text in the public domain from the 20th edition of Gray 's Anatomy ( 1918 ) ^ Jump up to : Field RE, Rajakulendran K ( 2011 ). `` The labro - acetabular complex ''. J Bone Joint Surg Am. 94 ( Suppl 2 ) : 22 -- 27. PMID 21543684. doi : 10.2106 / JBJS. J. 01710. Jump up ^ Griffiths EJ, Khanduja V ( 2012 ). `` Hip arthroscopy : evolution, current practice and future developments ''. Int Orthop. 36 ( 6 ) : 1115 -- 1121. PMC 3353094. PMID 22371112. doi : 10.1007 / s00264 - 011 - 1459 - 4. Jump up ^ Petersilge C ( 2005 ). `` Imaging of the acetabular labrum ''. Magn Reson Imaging Clin N Am. 13 ( 4 ) : 641 -- 52. PMID 16275573. doi : 10.1016 / j. mric. 2005.08. 015. Jump up ^ Balakumar J. `` Hip Dysplasia in the Child, Adolescent and Adult ''. jitbalakumar.com.au. Archived from the original on 2013 - 04 - 25. Retrieved 2013 - 06 - 08. Jump up ^ OrthoInfo ( September 2010 ). `` Femoroacetabular Impingement ( FAI ) ''. orthoinfo.aaos.org. the American Academy of Orthopaedic Surgeons. Retrieved 2013 - 06 - 08. Jump up ^ Itokazu M, Takahashi K, Matsunaga T, Hayakawa D, Emura S, Isono H, Shoumura S ( 1997 ). `` A study of the arterial supply of the human acetabulum using a corrosion casting method ''. Clin Anat. 10 ( 2 ) : 77 -- 81. PMID 9058012. doi : 10.1002 / ( SICI ) 1098 - 2353 ( 1997 ) 10 : 2 < 77 : : AID - CA1 > 3.0.CO ; 2 - Q. Jump up ^ Martin, A.J. ( 2006 ). Introduction to the Study of Dinosaurs. Second Edition. Oxford, Blackwell Publishing. pg. 299 - 300. ISBN 1 - 4051 - 3413 - 5. Jump up ^ Smith, Dave. `` Dinosauria : Morphology ''. UC Berkeley. Retrieved 21 January 2013. Jump up ^ Moore, Keith L. ; Dalley, Arthur F. ; Agur, A.M.R. ( 2013 - 02 - 13 ). Clinically Oriented Anatomy. Lippincott Williams & Wilkins. ISBN 9781451119459. External links Look up acetabulum in Wiktionary, the free dictionary. Wikimedia Commons has media related to Acetabulum. Anatomy photo : 17 : 01 - 0501 at the SUNY Downstate Medical Center - `` Major Joints of the Lower Extremity : Hip joint '' Anatomy photo : 43 : os - 0407 at the SUNY Downstate Medical Center - `` The Female Pelvis : Articulated bones of pelvis '' Bones of the pelvis General sacrum coccyx hip bone Ilium body arcuate line wing gluteal lines posterior anterior inferior iliac spines anterior superior anterior inferior posterior superior posterior inferior other : crest tuberosity tubercle fossa Ischium body ischial spine lesser sciatic notch superior ramus tuberosity of the ischium inferior ramus no substructures Pubis body pubic crest superior ramus pubic tubercle obturator crest inferior ramus pectineal line Compound acetabulum acetabular notch iliopubic eminence / iliopectineal line linea terminalis ischiopubic ramus / pubic arch Foramina obturator foramen greater sciatic foramen / greater sciatic notch lesser sciatic foramen Landmarks pelvic inlet pelvic brim pelvic outlet Retrieved from `` https://en.wikipedia.org/w/index.php?title=Acetabulum&oldid=802119746 '' Categories : Wikipedia articles incorporating text from the 20th edition of Gray 's Anatomy ( 1918 ) Pelvis Bones of the lower limb Bones of the pelvis Hidden categories : Medicine infobox template using GraySubject or GrayPage Medicine infobox template using Dorlands parameter Talk Contents About Wikipedia Azərbaycanca Bosanski Deutsch Español Euskara فارسی Français Galego 한국어 Italiano עברית Қазақша Lietuvių Nederlands Polski Português Slovenčina Suomi Svenska Tagalog Українська Edit links This page was last edited on 24 September 2017, at 03 : 27. 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Question: where is the acetabulum located in the body
Answer: is a concave surface of a pelvis