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Across 4. sudden expulsion of semen from the penis due to muscular contractions 5. liquid that surrounds and protects the foetus 9. another word for sex cells 10. a hormone that plays an important role in the menstrual cycle and in the early stages of pregnancy 11. also known as the womb where a baby develops during pregnancy 13. Female hormone responsible for preparing the body to make babies. 16. where seminal fluid is produced 17. single egg cell is called this 18. fluid produced by the prostate gland 20. the developing baby during pregnancy 23. Male hormone responsible for the development of sex organs and secondary sexual characteristics 26. Changes in sexual organs as they mature are known as _______________ sexual characteristics 28. a sac containing amniotic fluid and embryo 30. release of an egg during the menstrual cycle 31. where the umbilical cord was attached to the placenta 32. reproduction requiring only one parent

Down 1. organ which carries sperm out of the male's body 2. when male and female sex cells unite/fuse 3. male dex cell of a plant 6. loss of the lining of the uterus during the menstrual cycle 7. fusing of a nucleus from a male and female sex cell 8. visible sexual changes that occur in humans during puberty are called ________________ sexual characteristics 9. the period of time it takes for a baby to develop in the womb 12. connects the foetus to the placenta 14. also known as the fallopian tube 15. Aquatic animals like fish and frogs undergo ________________________ fertilization 19. clones are genetically _________________________ 21. a muscular sac containing the testes 22. where the penis enters the female's body and sperm is received 23. organ where sperm are produced 24. made up of sperm cells and seminal fluid 25. organ where eggs are made and released from 26. organ that provides the foetus with oxygen and nutrients and removes waste substances 27. Where oestrogen is made 29. pollen and sperm are both _________ gametes