... Organs – Wall of uterus • Endometrium – Innermost lining – Vascular – Tubular glands – mucus • Myometrium – Middle, thick, muscular layer • Perimetrium – Thin layer covering the myometrium – Secretes ... (cont.) – Last months – fetal brain cells rapidly divide – GI and respiratory systems last to develop • Fetal period – Week through birth – Rapid growth – 5th month – skeletal muscles active – 6th ... rights reserv ed 27- 32 Erection, Lubrication, and Orgasm • Nervous stimulation – Clitoris becomes erect – Bartholin’s glands activate – lubrication – Vagina elongates • Orgasm – Sufficient stimulation...