How Erection and Ejaculation happen?

It takes a whole mix of hormones and chemicals to create an erection and ejaculation. In this article we will learn how all this comes together, how erection and ejaculation happen in men.

What happen during erection
First we need to know a little about blood flow through our penis during non erection (flaccid) state. At the same time to understand how our body produces an erection.

Blood supply to the erectile tissue of the penis is via the two deep central arteries known as cavernosal arteries. One runs down the length of each cigar shaped corpus cavernosium.

The corpora cavernova make up the bulk of the spongy erectile tissue of the penis. Blood flows out of the erectile tissue through the drainage system of open veins around the outside wall of the corpus cavernosum.

1. We become sexually stimulated by our thought and action.

2. Our body releases a chemical known as nitric oxide that dilates blood vessels.

3. Nitric oxide in return triggers the action of guanylate cyclase, an enzyme that activates an erection. It works by prompting the release of a chemical called cyclic guanosine monophosphate (cGMP). This causes the smooth muscle cells in the penis erectile to relax.

4. As the smooth muscle cell become relaxes, they allow the central artery and other incoming blood vessels to widen up as well as the mesh of spongy erectile tissue. More blood will flow through the central artery into the spongy erectile tissue of our penis.

As the two cigars shaped corpora cavernosa fill with blood, the spongy tissue presses up against the veins in the outside walls of the corpora cavernosa, compressing them and stopping the blood from flowing back out of the penis. When more blood flows in and less flowing out, the penis becomes erected.

What happen during ejaculation?
When we are sexually stimulated, friction of the glands of the penis and other stimuli send signals through the nervous system that result in ejaculation.

During ejaculation, the walls of the epididymis contract to create peristaltic waves that push sperm into the vas deferens.

Nerves also stimulate the seminal vesicles and the prostate to contract which forces semen into the urethra.

Muscles surrounding the urethra contract and propel semen out of the penis.

To prevent semen from flowing backwards into the bladder, the muscles in the neck of the bladder tighten up to close it off.

5. Semen (mixture of sperm and secretions) is released through the penis during an ejaculation.

6. Our body then produces an enzyme known as phosphodiesterase 5 (PDE 5) that breaks down erection
stopping the release of cyclic guanosine monophosphate (cGMP) body chemical. Blood is redirected back out of our penis and into the rest of our body.

7. Our penis returns to its previous limp (flaccid) state.

A stunningly beautiful and sexy woman comes into your room and walks towards you. Your eyes send signal to your brain as you starting to become sexually aroused.

We, men can be turned on by a spell binding moments like this or other sexual stimuli, eg. Photos, voice, books, visual, our imagination and etc…