BIO3 Human reproduction

3. The mixture of sperm and fluid.
6. The fusion between a male gamete and a female gamete.
8. The release of semen into the vagina.
9. It receives the sperm during sexual intercourse.
10. They produce sperm cells and the male sex hormones.
11. The female gamete in human.
13. A ring of muscle at the entrance to the uterus to keep the baby in placed during pregnancy.
14. Where fertilisation takes place.
15. The release of an egg from one of the ovaries.
16. This is where a baby develops until it is born.
17. A tube that carries urine from the bladder out of the body.
19. They produce nutrients to keep sperm alive.
21. This carries urine or semen out of the body.

1. The __________ cord connects the foetus to the placenta.
2. Blood from the lining of the uterus leaves the body through the vagina.
4. An organ where substances pass between the mother’s blood and the foetus’ blood.
5. The steps taken to avoid pregnancy.
7. The attachment of an embryo to the lining of the uterus.
12. The time a baby spends in the uterus from fertilisation until birth.
15. They release an egg cell once every 28 days and produce the female sex hormones.
18. A ball of cells developed when the fertilised egg divides.
20. The male gamete in human.