c. Crura of the Penis, being the conclusion of—
d. Corpora Cavernosa Penis.
e. Sphincter of the Anus.
f. Levatores Ani, covered by a fascia or prolongation of the triangular ligament of the Urethra.
g. Great Gluteal Muscles.
h, h. Triangular Ligament of the Urethra. The artery of the bulb is seen on the left as it runs between the Crus Penis and bulb of the Urethra.
The Gluteal Muscles help the rotatory motion of the thigh, and give support generally to the buttocks.
The Sacro-Sciatic Ligaments assist in the firm union of the bones of the pelvis.
The Erector Muscles of the penis propel the urine and semen forward; and, by grasping the bulb of the urethra, push the blood toward the corpus cavernosum and the glans, and thus distend them.
The Accelerator Urinæ Muscles, as their name implies, help to eject the urine and semen.