Comprised of 4 bones: Two hip bones, the sacrum,and the  coccyx.

Located between the articulating surfaces of the sacrum and each of the two attaching ilium bones; serve to interlock these three bones.  These weight-bearing synovial joints move together and are therefore known as bicondylar joints.   

Prominent structure protruding from the ischium posteriorly.

A rounded prominence that extends outwards from the ischium, just inferior to the ischial spine (when we sit our weight is resting on this).

Found just superior to the ischial spine, is a key feature that is converted into a foramen  (opening) by the sacrospinous ligament.

Extends from the medial side of the sacrum, crossing over to the ischial spine.

Travels from the posterior/dorsal sacrum to attach to the ischial tuberosity.

Originates on the anterior surface of the sacrum, passing through the greater sciatic foramen to attach to the greater trochanter of the femur and fills the space of the greater sciatic foramen.

Attaches to the bony parameter of the obturator foramen and moves toward the lesser sciatic foramen, and attaches along with the piriformis to the greater trochanter of the femur.

Levator Ani muscles :

Puborectalis 

Pubococcygeus 

Iliococcygeus 

Coccygeus 

Piriformis and Obturator internus muscles 

During relaxation of this muscle, the angle between the rectum and the anal canal is reduced.  This angle reduction combined with the relaxation of the internal and external sphincters  allows for defecation to occur.  

Muscular ring that surrounds the anal canal.  It is formed from the circular smooth muscle that composes the wall of the rectum, therefore the action of this sphincter is completely involuntary.

A flat elliptical plane of muscular fibers that are intimately associated with the integument surrounding margins of the anus.  It is formed from skeletal muscle fibers of the levatoranias the rectum passes through the pelvic floor, and is therefore under voluntary control.  It keeps the anal canal closed, and helps fix the central point of the peritoneum.

Are suspended  from the thick connective tissue of the obturatorinternus, also known as  the tendinousarch of obturatorinternus.

The base of the bladder lies between the rectum and the pubic symphysis.  It is superior to the prostate.  

The bladder sits inferior to the uterus and anterior to the vagina.  Due to it’s position, the maximum capacity of the female bladder is lower than in males.  

A hollow, muscular organ, with highly elastic properties, and it sits on the pelvic floor.  

Urine enters the bladder from the ureters through these, and is then excreted through the urethra.   

Due the location of the uterus and the pressure it exerts downward on the bladder, the maximum capacity of the female bladder is less than that of males.

Shorter than in males and is approximately 4-5 cm long.  Located just behind the pubic symphysis, it is embedded in the anterior wall of the vagina as it travels obliquely downward.

This muscular diaphragm forms a partition that both separates the pelvic cavity from the perineal region just below, and supports the rectum, prostate and urethra in males, and the urethra and vagina in females.

The posterior portion of the pelvic floor is comprised of the coccygeus muscle, which arises from the ischial spine and inserts into the lower sacrum just superior to the sacrospinous ligament.

The anterior portion of the pelvic floor is formed by the levatorani, which is a broad, thin muscle that fills the majority of the pelvic outlet .  The structural integrity of the pelvic floor is primarily attributed to these muscles.  The levatorani is anatomically divided into 3 parts: the iliococcygeus, pubococcygeus, and puborectalismuscles, all of which are suspended  from the thick connective tissue of the obturatorinternus, also known as  the tendinousarch of obturatorinternus.

Three parts, the prostatic, membranous, and spongy urethra. 

Immediately after exiting the prostate that surrounds it, the short portion of the urethra between the inferior prostate and  the beginning of the corpus spongiosum 

the last portion of the male urethra found encased within the corpus spongiosum of the penis.  The male urethra ends at the external urethral orifice found at the end of the penis.

It has anterior and posterior portions.  The mesometriumis the largest portion of the broad ligament thatis found on the body of the uterus . The mesosalpinxis  the portion of the broach ligament associated with the uterine tubes.  The mesovariumis a small portion of the broad ligament, that attaches to the undersurface of the ovaries only. 

Pair of egg-producing organs found in the female pelvis, located in the lateral wall of the pelvis.  

found on the opposite pole of the ovary from the ovarian ligament.  Its function is to attach the ovary to the pelvic wall, and carries within it the ovarian artery and vein.