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because the meaning of the word os innominatum....is unnameable...it can't be named.

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Q: Why is each half of the pelvic girdle called as an os innominatum?
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What bones are included in each of pectoral and pelvic girdles?

The pectoral girdle is formed by the scapula, the humerus and the clavicle 3 bones in total


How many bones in your pelvic?

There are two pelvic bones in human body. Each is made of union of three bones. It means Pubis or Pubic bone, Ischium bone and Ileac bone. Both bones are united in front side by cartilagenous joint called as pubic symphysis. On back side, you have Sacrum bone to form Pelvic Girdle.


2 bones that form the pelvic bone?

The Illium, pubis, and the ischiumilium, sacrum, ischiumtwo coxal bones that articulate with each other anteriorly and with the sacrum posteriorly. The pelvic girdle performs three functions; bears weight of body, serves as place of attachment to legs, protects organs of pelvic cavity including urinary bladder, and reproductive organs.Ischium, Ilium and pubis.2 ox coxae and the sacrum


What are the coxal bones composed of?

The Pelvic Girdle, also called the hip girdle, is composed to two coxal (hip) bones. The coxal bones are also called the ossa coxae or innominate bones. During childhood, each coxal bone consists of three separate parts: the ilium (denoted in purple above), the ischium (denoted in red above), and the pubis (denoted in blue above). In an adult, these three bones are firmly fused into a single bone. In the picture above, the coxal bone on the left side has been divided into its component pieces while the right side has been preserved.In the back, these two bones meet on either side of the sacrum. In the front, they are connected by a muscle called the pubic symphysis (denoted in green above).The pelvic girdle serves several important functions in the body. It supports the weight of the body from the vertebral column. It also protects and supports the lower organs, including the urinary bladder, the reproductive organs, and the developing fetus in a pregnant woman.The pelvic girdle differs between men and woman. In a man, the pelvis is more massive and the iliac crests are closer together. In a woman, the pelvis is more delicate and the iliac crests are farther apart. These differences reflect the woman's role in pregnancy and delivery of children. When a child is born, it must pass through its mother's pelvis. If the opening is too small, a cesarean section may be necessary.


What are the three bones in the pelvic girdle of a child?

The Pelvic Girdle, also called the hip girdle, is composed to two coxal (hip) bones. The coxal bones are also called the ossa coxae or innominate bones. During childhood, each coxal bone consists of three separate parts: the ilium (denoted in purple above), the ischium (denoted in red above), and the pubis (denoted in blue above). In an adult, these three bones are firmly fused into a single bone. In the picture above, the coxal bone on the left side has been divided into its component pieces while the right side has been preserved. In the back, these two bones meet on either side of the sacrum. In the front, they are connected by a muscle called the pubic symphysis (denoted in green above). The pelvic girdle serves several important functions in the body. It supports the weight of the body from the vertebral column. It also protects and supports the lower organs, including the urinary bladder, the reproductive organs, and the developing fetus in a pregnant woman. The pelvic girdle differs between men and woman. In a man, the pelvis is more massive and the iliac crests are closer together. In a woman, the pelvis is more delicate and the iliac crests are farther apart. These differences reflect the woman's role in pregnancy and delivery of children. When a child is born, it must pass through its mother's pelvis. If the opening is too small, a cesarean section may be necessary.


What is the posterior portion of pectoral girdle?

the scapula (shoulder blade) and the clavicle (collarbone) make up the pectoral girdle. Each upper limb articulates with the trunk at the pectoral girdle, or shoulder girdle The pectoral girdle consists of two broar, flat scapulae and the two slender, curved clavicles. Each clavicle articulates with the manubrium of the sternum; these are the only direct connections between the pectoral girdle and the axial skeleton. Skeletal muscles support and position each scapula, which has no bony or ligamentous connections to the thoracic cage.


What are the 6 major structural differences between the anatomical plan of the upper and lower limbs?

The Pelvic Girdle is a complete circle while the Pectoral Girdle is notThe Pelvic Girdle does not support the weight of the body, rather it is the attachment site for many muscles that move the upper limbs. (the collar bone's main function is to keep the shoulder joint away from the midline of the body allowing greater it greater mobility). In contrast, the pelvic girdle receives the weight of the upper body from the axial skeleton, (the spine) and supports it.They both employ hinge joints in the middle, "the ginglymus of the upper extremities and the tibiofemoral joints of the lower extremities"They both have an interosseous membrane separating them. (This keeps them at a fixed distance from each other. It only allows slight movements between them.)The femur has a landmark called the "fovea" through which a tiny ligament connects it to the acetabulum. The humerous does not have this.the most commonly fractured bone of the upper extremities is the upper arm, (humerous), while the most commonly fractured bone(s) of the lower extremities is the lower leg (tibia and fibula,) (the crural region).lower extremity has a large sesamoid bone called the patella, upper extremities do not.the distal ends of the ulna, radius, tibia, and fibula, are called, the styloid processes and the lateral and medial malleolus. These landmarks help to stabilize the condyloid joints of the wrists and ankles.there's probably more, but this is all I can think of.


What is the function of the obturator foramen?

According to Gray's Anatomy, the obturator foramen is contained by sometimes called pelvic region of the trunk) is the lower part of the trunk, between the abdomen and the lower limbs (legs).The pelvis includes several structures:The bony pelvis, or pelvic skeleton, the part of the skeleton connecting the sacrum region of the spine to the femurs.Subdivided into the pelvic girdle (the two hip bones, which are part of the appendicular skeleton) and the pelvic region of the spine (sacrum, and coccyx, which are part of the axial skeleton)The pelvic cavity, typically defined as a small part of the space enclosed by the pelvic skeleton, delimited by the pelvic brim above and the pelvic floor below; alternatively, the pelvic cavity is sometimes also defined as the whole space enclosed by the pelvic skeleton, subdivided into:The greater or false pelvis, above the pelvic brimThe lesser or true pelvis, below the pelvic brimThe pelvic floor or pelvic diaphragm, below the pelvic cavityThe perineum, below the pelvic diaphragmIn the human, the pelvic skeleton is formed in the area of the back (posterior dorsal), by the sacrum and the coccyx (the caudal portion of the axial skeleton), and laterally and anteriorly (forward and to the side), by a pair of hip bones, the lower extremity, (parts of the appendicular skeleton).In an adult human being, the pelvic skeleton is thus composed of three large bones, and the coccyx (3-5 bones);However, before puberty, each hip bone consists of three discrete (separate) bones - the ilium, ischium, pubis - that have yet to fuse at adulthood; thus, in puberty, the human pelvic skeleton can comprise more than 10 bones, depending upon the composition of the person's coccyx.


What does the vertebral column support?

The axis supports the weight of the head.


What hip bone articulates with the axial skeleton via the sacrum?

The articulation formed by the ilium (hip bone) and the sacrum is called the sacroiliac joint (SI joint). Together, the hip bones and the sacrum compose the pelvic girdle.The pelvic girdle.The joint formed by this articulation is called the sacroiliac joint (SI).


What is the shoulder girdle bone that is unattached to the axial skeleton?

scapula : either of a pair of large triangular bones lying one in each dorsal lateral part of the thorax, being the principal bone of the corresponding half of the shoulder girdle, and articulating with the corresponding clavicle or coracoid -called also shoulder bladeScapula


Difference between false pelvis and true pelvis?

The male and female pelvic areas vary in a number of ways, as required by the differences in internal organs and their function. The most obvious difference is a shorter, broader pelvis in females, which is limited by the need to articulate the hips and legs (to walk upright in a normal manner).Characteristics of Male Pelvis :Bone are taller, heavier, and thickerMore prominent bone markingsObturator foramen is roundPubic arch v-shapedPelvic inlet heart-shapedSmaller pelvic outlet smallerIschipubic rami is more evertedSciatic notch is narrowerSubpubic arch is more acuteIschial spine is projected inwardsAcetabulum is largerCharacteristics of Female Pelvis :Bones are lighter and less denseWider / shallower profileLarger superior and inferior aperturesObturator foramen is ovalPubic arch widerPelvic inlet oval-shapedIschiopubic rami is less evertedSciatic notch is widerSubpubic arch is widerIschial spine is projected outwardsAcetabulum is smaller