Reproductive Systems

• The penis passes urine and sperm out of the man's body.
• The urethra is the tube inside the penis that can carry urine or sperm.
• The gland adds fluid to sperm to make semen.
• The sperm duct carries sperm from the testes through the urethra.
• The testes are where sperm cells are produced.
• The scrotum holds the testes outside the body.
• The oviduct is where fertilisation occurs.
• The ovaries are where egg cells are produced.
• The uterus is where implantation occurs foetus develops.
• The cervix is a ring of muscle between the vagina and the uterus.
• The vagina is where the penis is placed during intercourse.
• The tail of the sperm cell allows it to swim. The nucleus contains genetic material to form an embryo. The mid piece contains many mitochondria to release energy.
• The cytoplasm of the egg cell is a large store of food. The nucleus contains genetic material to form an embryo.
• Sex cells are haploids, which means they both have one set of 23 chromosomes. When joint together, they make a zygote, which is a diploid, which has 2 sets of 23 chromosomes.
• Fertilisation occurs when the nucleus of the sperm fuses with the nucleus of the egg to form a zygote.
• The fertilised egg or zygote becomes an embryo and passes into the uterus and gets attached to the uterus wall. This process is called implantation.