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Pelvic spurs (also known as vestigial legs) are external protrusions found around the cloaca in certain superfamilies of snakes belonging to the greater infraorder Alethinophidia. [1] These spurs are made up of the remnants of the femur bone, which is then covered by a corneal spur, or claw-like structure. [ 1 ]
These spurs have a high degree of mobility and can be moved by appropriate musculature from their normal position lying along and against the body, into a perpendicular plane to resemble miniature legs. The pelvic spurs are usually held in the "erect" position and used by the male (at least) to stimulate the female.
Lateral view of a woman's prominent mons pubis. Although present in both men and women, the mons pubis tends to be larger in women. [1] [6] Its fatty tissue is sensitive to estrogen, causing a distinct mound to form with the onset of female puberty. [4] [6] [7] [8] This pushes the forward portion of the labia majora out and away from the pubic ...
The semantic field of the term crotch is sometimes expanded to include objects which have shapes similar to that of the anatomical human crotch. [9] This may include botanical structures such as the area where tree branches are joined together [10] or mechanical structures which fork or branch or where ramification takes place. [11]
In a propubic pelvis, however, the pubic bone extends forward towards the head of the animal, as can be seen in the typical saurischian pelvic structure pictured below. The acetabulum , which can be thought of as a "hip-socket", is an opening on each side of the pelvic girdle formed where the ischium , ilium , and pubis all meet, and into which ...
The obturator foramen is situated inferior and somewhat anterior to the acetabulum.It is bounded by the pubis bone and the ischium: superiorly by the (grooved obturator surface) of the superior ramus of pubis, inferiorly by the ramus of ischium, and laterally by (the anterior edge of) the body of ischium (including by the margin of the acetabulum).
Pelvic fascia extends to cover the organs within the pelvis. It is attached to the fascia that runs along the pelvic floor along the tendinous arch. The fascia which covers pelvic organs can be divided according to the organs that are covered: The front is known as the "vesical layer". It forms the anterior and lateral ligaments of the bladder.
The pubic symphysis is a nonsynovial amphiarthrodial joint. The width of the pubic symphysis at the front is 3–5 mm greater than its width at the back. This joint is connected by fibrocartilage and may contain a fluid-filled cavity; the center is avascular, possibly due to the nature of the compressive forces passing through this joint, which may lead to harmful vascular disease. [2]