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Chromosomes Located in the nucleus, they are made of DNA and protein, contain genetic information. Gamete Sex cells (e.g. egg or sperm) Fertilization When two gametes join together. Zygote The new cell formed after fertilization. Hermaphrodite An organism which produces both the male and female gametes. Ova Egg Ovaries Where the eggs are stored. Oviducts Fallopian tubes where the egg travels down to the uterus. Uterus A thick, walled organ made of muscle, where a baby can grow. Another word for it is womb. Cervix The neck of the womb that leads to the vagina. Vagina Muscular tube leading from the uterus to the outside. Urethra Opening of the bladder that leads to the front of the female genitals. Opens separately to the outside. Rectum Opening from the colon that is behind the vagina. Opens separately to the outside. Spermatozoa Male gametes also called sperm. Testes Where the sperm is made in males. Scrotum The two sacs of skin which hold the testes and are outside the body. Vas Deferens A tube which carries away sperm from the testes to join the urethra Urethra (male) Tube which carries urine and sperm from the penis. This happens at different times. Prostrate Gland A gland within the male reproductive system that is located just below the bladder. Seminal Vesicles It makes the fluid for sperm to swim in. Follicle It is a small space, filled with liquid, that surrounds the egg cell. Graafian Follicle The follicle grows bigger and moves to the edge of the ovary. Ovulation When the Graafian follicle bursts and the egg leaves the ovary. Tubules The tiny tubes where sperm are made. These are located in the testes. Ejaculation Process where sperm is pushed out of the penis by contracting the muscles along the penis. Embryo After fertilization occurs, the zygote divides to make a ball of cells that is called the embryo. Implantation When the embryo sinks into the thick, spongy lining of the uterus. Placenta It provides nutrients and oxygen from the mother to the baby through the umbilical cord. Umbilical Cord Joins the embryo (baby) to the placenta Amnion It is a fluid that surrounds the embryo to support and protect it. Gestation Period The length of time between fertilization and the birth. Labor When the muscle walls of the uterus contract. Afterbirth When the placenta rips away from the uterus wall and passes out through the vagina after the baby has been born. Menstruation When the lining of the uterus breaks up and slowly moves out the vagina. This process takes about 5 days and occurs every 28 days in females.