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The navicular fossa is a short dilated portion of (the spongy (or cavernous or penile) portion of) the male urethra within the glans penis just proximal to the external urethral meatus. The roof of the fossa is especially dilated, forming a lacuna; medical instruments being inserted into the male urethra should initially be directed towards the ...
In male anatomy, the lacuna magna (also called Guérin's sinus) is the largest of several recesses in the roof of the navicular fossa of the male urethra. Structure [ edit ]
In male dogs the glans penis is smooth and consists of two parts called the bulbus glandis and pars longa glandis. [56] The glans of a fossa's penis extends about halfway down the shaft and is spiny except at the tip. In comparison, the glans of felids is short and spiny, while that of viverrids is smooth and long. [57]
Download QR code; Print/export ... move to sidebar hide. Fossa navicularis is an alternate name for two different boat-shaped ... navicular fossa of male urethra ...
Secretory fluid from the bulbourethral glands appearing on the glans of a human penis The bulbourethral gland contributes up to 4 ml of fluid during sexual arousal. [ 9 ] The secretion is a clear fluid rich in mucoproteins that help to lubricate the distal urethra and neutralize any acidic urine residue that remains in the urethra.
Other symptoms include severe pain, loss of erection, and swelling. [5] Symptoms of urethral injury include hematuria, blood at the meatus, and dysuria. [1] If left untreated, complications result in 28–53% of cases; these include permanent curvature of the penis, fistula, urethral diverticulum, priapism, and erectile dysfunction. [5]
Some textbooks will subdivide the spongy urethra into two parts, the bulbous and pendulous urethra. The urethral lumen (interior) runs effectively parallel to the penis, except at the narrowest point, the external urethral meatus, where it is vertical. This produces a spiral stream of urine and has the effect of cleaning the external urethral ...
As with all mammals, a dog's penis is made up of three pieces of erectile tissue. These are the two corpora cavernosa and the singular corpus spongiosum which continues in the glans . A notable difference from the human penis is that the visible part during an erection consists entirely of the glans.