Fill in the Blanks Unit 3: ReproductionOnline version Read the following texts and complete the missing words. by Vicente León 1 testicles trimester dilation placenta vagina fertilisation cord ova deferens sperm vulva expulsion grows tubes vagina childhood hear umbilical embryo vesicles penis vagina adolescence delivery foetus adulthood ovaries develop fallopian vas 1 . In , children learn how to walk , talk , and read . In boys and girls become ready to reproduce when their systems reach maturity . Later comes that is comprised of younger adulthood , middle adulthood , and old age . 2 . The external male reproductive system is made up of the and . The internal parts are the urethra , seminal , and . The male reproductive cells are called which are made in the testicles . The female reproductive cells are called or eggs which are made in the two . The internal parts of the female reproductive system are the , uterus , and ovaries . The external part is the . 3 . Every twenty - eight days an egg is released from one of the ovaries . If sperm enters the , meets an egg in the and gets inside the egg , this process is called . 4 . Over the next 9 months , the changes a lot . Early in the first the baby's organs start to . At the end of this trimester the embryo is called a . In the second trimester the foetus can and starts to move . During the third trimester the foetus and gains weight . In the first stage of birth , called , the opening of the uterus expands and the baby is pushed into the vagina . In the second stage , called , the baby is pushed out of the body through the . The is cut and the baby cries for the first time . In the third stage , called , the is also pushed out of the mother's body .
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