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Although the reproductive system is not necessary to keep a person alive, this system is vital to the lives of future generations. The reproductive systems in males and females are different. Males produce sperm cells in the testes, which are stores in the epididymis until ejaculation occurs. At that time, the semen (sperm and seminal fluid) travel through the vas deferens to the urethra, through which it leaves the body. Females produce egg cells in the ovaries, and they have all of their eggs at birth. At the middle of each menstrual cycle, an egg matures and is released from an ovary into the fallopian tube. If it comes into contact with sperm cells, it can be fertilized there. The fertilized egg, also called a zygote, immediately undergoes mitosis to produce more cells.
The zygote, or embryo, is then implanted in the lining of the uterus where it continues to grow. Through the next nine months, or three trimesters of pregnancy, the embryo’s cells will develop into specialized organs and systems. After three months, the embryo can be called a fetus because most of its organs have started developing and it has a more human form. By the time the baby is born, its organs should be fully developed and ready to support this new life.
When you have completed this lesson, you should be able to:
describe the structure and functions of the male reproductive system
describe the structure and functions of the female reproductive system
explain the connection between meiosis and the process of sexual reproduction
describe development following implantation
If you do not feel comfortable with these topics, go back and review the lesson before attempting your assignment.
Now it is time to complete the assessment for this lesson. Contact your instructor if you have questions or need additional help.
Ok no probs but that's paid work right there , or just tell us the bits your stuck on , teamwork .