HUMAN SEXUAL RESPONSE

Vasocongestion

The filling of a tissue with blood due to increased blood flow.

Myotonia

Increased muscle tension in skeletal and smooth muscles.

Excitement Phase

Prepares the penis and vagina for sexual intercourse, involving vasocongestion and myotonia.

Plateau Phase

Continues responses from the excitement phase, with changes in the vagina facilitating sperm reception and increased breathing and heart rate.

Orgasm Phase

Involves rhythmic, involuntary contractions of reproductive structures, with male orgasm having emission and expulsion stages, and female orgasm involving contractions of the uterus and outer vagina.

Resolution Phase

Completes the sexual response cycle by responding to the earlier stages, marking the end of the cycle.

Emission

forces semen into the urethra

expulsion

expels the semen.