Erection

An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firmer, engorged and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular and endocrine factors, and is often associated with sexual arousal or sexual attraction, although erections can also be spontaneous. The shape, angle and direction of an erection varies considerably in humans.

Physiologically, erection is triggered by the parasympathetic division of the autonomic nervous system (ANS), causing nitric oxide (a vasodilator) levels to rise in the trabecular arteries and smooth muscle of the penis. The arteries dilate causing the corpora cavernosa of the penis (and to a lesser extent the corpora spongiosum) to fill with blood; simultaneously the ischiocavernosus and bulbospongiosus muscles compress the veins of the corpora cavernosa restricting the egress and circulation of this blood. Erection subsides when parasympathetic activity reduces to baseline.

Hard On (video compilation)

Hard On is a 14-track music video compilation by Frankie Goes to Hollywood. It was released by ZTT Records in 2000. The compilation contains all main music videos and includes interviews with Paul Rutherford, Trevor Horn, Paul Morley, Paul Lester and Gary Farrow. It also includes The story of Frankie Goes To Hollywood and ZTT Records as well as a picture gallery of record sleeves, photographs, press articles and magazine covers. In 2009, a new CD compilation was released titled Frankie Say Greatest which was also released as a DVD. The DVD is an exact replica of Hard On except the cover work is different.

Formats

It was released on DVD in NTSC and PAL.

Track listing

OD

OD or Od may refer to:

Medicine

Music

Computing

Travel

Other uses

2000 O.D

2000 O.D is a Space Tribe album published in 1999 by Spiritzone.

Album listing

O.D. (musician)

O.D. is one of the founders of the industrial/metal/electronic band Velcra. He has worked on samples/programming and guitars on the band's first two albums and is the main producer on their third album.

External links

References