Pelvis

pelvicpelvic girdlehippelvic girdleshuman pelvispelvic bonespelvic regionhipsbony pelvisfemale pelvis
The pelvis (plural pelves or pelvises) is either the lower part of the trunk of the human body between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton).wikipedia
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Abdomen

abdominalabdominal musclesbelly
The pelvis (plural pelves or pelvises) is either the lower part of the trunk of the human body between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton).
The abdomen (colloquially called the belly, tummy or midriff) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates.

Thigh

thighsmedial thighmid-thighs
The pelvis (plural pelves or pelvises) is either the lower part of the trunk of the human body between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton).
In human anatomy, the thigh is the area between the hip (pelvis) and the knee.

Pelvic floor

pelvic diaphragmpelvic floor musclespelvic muscles
The pelvic region of the trunk includes the bony pelvis, the pelvic cavity (the space enclosed by the bony pelvis), the pelvic floor, below the pelvic cavity, and the perineum, below the pelvic floor.
The pelvic floor or pelvic diaphragm is composed of muscle fibers of the levator ani, the coccygeus muscle, and associated connective tissue which span the area underneath the pelvis.

Hip bone

pelvic boneinnominate bonepelvic bones
The pelvic skeleton is formed in the area of the back, by the sacrum and the coccyx and anteriorly and to the left and right sides, by a pair of hip bones.
The two hip bones join at the pubic symphysis and together with the sacrum and coccyx (the pelvic part of the spine) comprise the skeletal component of the pelvis – the pelvic girdle which surrounds the pelvic cavity.

Pelvic cavity

lesser pelvisgreater pelvistrue pelvis
The pelvic region of the trunk includes the bony pelvis, the pelvic cavity (the space enclosed by the bony pelvis), the pelvic floor, below the pelvic cavity, and the perineum, below the pelvic floor.
The pelvic cavity is a body cavity that is bounded by the bones of the pelvis.

Pelvic inlet

superior apertureApertura pelvis superior
The pelvic inlet or superior pelvic aperture, which leads into the lesser pelvis, is bordered by the promontory, the arcuate line of ilium, the iliopubic eminence, the pecten of the pubis, and the upper part of the pubic symphysis.
The pelvic inlet or superior aperture of the pelvis is a planar surface which defines the boundary between the pelvic cavity and the abdominal cavity (or, according to some authors, between two parts of the pelvic cavity, called lesser pelvis and greater pelvis).

Appendicular skeleton

appendicularextremities
The appendicular skeleton includes the skeletal elements within the limbs, as well as supporting shoulder girdle pectoral and pelvic girdle.

Pubic arch

subpubic angleArcus pubispelvic ischial arch
The pelvic outlet or inferior pelvic aperture is the region between the subpubic angle or pubic arch, the ischial tuberosities and the coccyx.
The pubic arch, also referred to as the ischiopubic arch, is part of the pelvis.

Urogenital diaphragm

The urogenital diaphragm consists mainly of the deep transverse perineal which arises from the inferior ischial and pubic rami and extends to the urogenital hiatus.
Older texts have asserted the existence of a urogenital diaphragm, also called the triangular ligament, which was described as a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenital diaphragm (perineal membrane) and superior fascia of the urogenital diaphragm.

Inferior pubic ramus

inferior ramusinferior ramus of the pubisinferior rami
The urogenital diaphragm consists mainly of the deep transverse perineal which arises from the inferior ischial and pubic rami and extends to the urogenital hiatus.
The inferior pubic ramus is a part of the pelvis and is thin and flat.

Acetabulum

acetabularhip socketacetabula
When standing, with the hip joint extended, the ligaments get twisted around the femoral neck, pushing the head of the femur firmly into the Acetabulum, thus stabilizing the joint.
The acetabulum (cotyloid cavity) is a concave surface of a pelvis.

Anococcygeal body

anococcygeal rapheanococcygeal ligamentAnococcygeal raphé
These arise between the symphysis and the ischial spine and converge on the coccyx and the anococcygeal ligament which spans between the tip of the coccyx and the anal hiatus.
The anococcygeal body (anococcygeal ligament, or anococcygeal raphe) is a fibrous median raphe in the floor of the pelvis, which extends between the coccyx and the margin of the anus.

Body cavity

body cavitiescoelomcavities
The pelvic cavity is a body cavity that is bounded by the bones of the pelvis and which primarily contains reproductive organs and the rectum.
The abdominopelvic cavity can be divided into the abdominal cavity, enclosed by the ribcage and pelvis and contains the kidneys, ureters, stomach, intestines, liver, gallbladder, and pancreas; and the pelvic cavity, enclosed by the pelvis and contains bladder, anus and reproductive system.

Sacroiliac joint

sacroiliacSI jointsacro-iliac
The hip bones are connected to each other anteriorly at the pubic symphysis, and posteriorly to the sacrum at the sacroiliac joints to form the pelvic ring. Each superior ring is formed by the iliac bone; the anterior side stretches from the acetabulum up to the anterior superior iliac spine; the posterior side reaches from the top of the acetabulum to the sacroiliac joint; and the third side is formed by the palpable iliac crest.
The sacroiliac joint or SI joint (SIJ) is the joint between the sacrum and the ilium bones of the pelvis, which are connected by strong ligaments.

Lumbar vertebrae

lumbar vertebralumbar spinelumbar
The lumbosacral joint, between the sacrum and the last lumbar vertebra, has, like all vertebral joints, an intervertebral disc, anterior and posterior ligaments, ligamenta flava, interspinous and supraspinous ligaments, and synovial joints between the articular processes of the two bones.
The lumbar vertebrae are, in human anatomy, the five vertebrae between the rib cage and the pelvis.

Pelvic brim

brim of the pelvis
The oblique plane passing approximately through the pelvic brim divides the internal part of the pelvis (pelvic cavity) into the false or greater pelvis and the true or lesser pelvis.

Pubis (bone)

pubispubic bonepubic
Each hip bone consists of 3 sections, ilium, ischium, and pubis.
In vertebrates, the pubic bone is the ventral and anterior of the three principal bones composing either half of the pelvis.

Torso

trunkupper bodyDorsal cutaneous branches
The pelvis (plural pelves or pelvises) is either the lower part of the trunk of the human body between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton).
Finally, the pelvic region houses both the male and female reproductive organs.

Hip

hip jointhipship-joint
They are attached to the sacrum posteriorly, connected to each other anteriorly, and joined with the two femurs at the hip joints.
coxae''), is the joint between the femur and acetabulum of the pelvis and its primary function is to support the weight of the body in both static (e.g. standing) and dynamic (e.g. walking or running) postures.

Obstetrical dilemma

making birthing easier
Because the pelvis is vital to both locomotion and childbirth, natural selection has been confronted by two conflicting demands: a wide birth canal and locomotion efficiency, a conflict referred to as the "obstetrical dilemma".
The obstetrical dilemma claims that this difference is due to the biological trade-off imposed by two opposing evolutionary pressures in the development of the human pelvis: smaller birth canals in the mothers, and larger skulls in the babies.

Sacrotuberous ligament

sacrotuberoussacrotuberous ligaments
The most important accessory ligaments of the sacroiliac joint are the sacrospinous and sacrotuberous ligaments which stabilize the hip bone on the sacrum and prevent the promonotory from tilting forward.
The sacrotuberous ligament (great or posterior sacrosciatic ligament) is situated at the lower and back part of the pelvis.

Anterior superior iliac spine

ASISanterior superior iliac crestInterspinous plane
Each superior ring is formed by the iliac bone; the anterior side stretches from the acetabulum up to the anterior superior iliac spine; the posterior side reaches from the top of the acetabulum to the sacroiliac joint; and the third side is formed by the palpable iliac crest.
It refers to the anterior extremity of the iliac crest of the pelvis, which provides attachment for the inguinal ligament, and the sartorius muscle.

Sacrospinous ligament

sacrospinous
The most important accessory ligaments of the sacroiliac joint are the sacrospinous and sacrotuberous ligaments which stabilize the hip bone on the sacrum and prevent the promonotory from tilting forward.
The sacrospinous ligament (small or anterior sacrosciatic ligament) is a thin, triangular ligament in the human pelvis.

Greater sciatic notch

greatersciatic notch
Additionally, these two ligaments transform the greater and lesser sciatic notches into the greater and lesser foramina, a pair of important pelvic openings.
The greater sciatic notch is a notch in the ilium, one of the bones that make up the human pelvis.

Ilium (bone)

iliumiliaillium
Each hip bone consists of 3 sections, ilium, ischium, and pubis.
The clade Dinosauria is divided into the Saurischia and Ornithischia based on hip structure, including importantly that of the ilium.