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Download Reproductive System
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All organisms reproduce If they reproduce sexually, they create egg and sperm cells The function of an organism’s reproductive system to produce more organisms like itself Males and females produce different types of reproductive cells Male cells are called sperm Female cells are called eggs The reproductive system is controlled by the release of hormones from the endocrine system These hormones start the process of sexual development and maintain secondary sex characteristics Each sex cell only carries half of the number of chromosome Offspring will be a random mixture of the parents’ genes from these two cells Different combinations of dominant and recessive genes in each sibling will cause them to be different Hormones are chemicals made in the body to cause the body to change The primary female hormones made in the ovaries are estrogen and progesterone The primary male hormone made in the testes is testosterone Fertilization occurs when the egg and one sperm join Occurs in the Fallopian tubes Fertilized egg will soon begin to multiply into a small ball of cells Fertilized egg will remain in uterus for about 40 weeks First 9 weeks of pregnancy Grows to the size of an adult thumb Most major body parts have formed 9 weeks to 40 weeks of pregnancy Floats in an amniotic sac of fluid Receives nutrition from umbilical cord attached to placenta Body parts need time to finish developing https://www.youtube.com/watch?v=ZxCISCqkZ6s https://www.youtube.com/watch?v=u6wViiGmMYM
