Final answer:
The term -ectasia in a biological context often refers to the dilation of blood vessels, crucial for sexual arousal when blood engorges erectile tissues like the and. The orgasm phase of the sexual response cycle involves rhythmic muscle contractions and can include ejaculation in males.
Step-by-step explanation:
The term -ectasia (or ecstasis) broadly refers to a state of dilation or expansion, often associated with blood vessels or other tubular structures within the body. In the context of the sexual response cycle, vascular ectasia describes the dilation of blood vessels that allows blood to engorge erectile tissues such as the, nipples, and various other genital structures during sexual arousal. This engorgement is essential for erection and sexual pleasure.
The sexual response cycle as identified by Masters and Johnson consists of four distinct phases: excitement, plateau, orgasm, and resolution. During these phases, individuals experience a variety of physiological changes including increased blood flow, muscle contractions, and eventual relaxation and return to a non- state. The sexual response cycle consists of excitement, plateau, orgasm, and resolution phases.