P3: Outline the main gross structure of the body system
P3 criteria: Outline the gross structure of all the main body systems The reproductive system
The reproductive system is the system of organs and parts which function in reproduction. The major function of the reproductive system is to ensure survival of the species. The male reproductive system consists of these parts; Testes, glands, sperm ducts, urethra and the penis. The female reproductive system consists of these parts; Ovaries, egg tubes, uterus, cervix and the vagina
The scrotums function is to produce millions of male sex cells (sperm) and to make male sex hormones which affect the way a man’s body develops. The sperm produced by the scrotum then passes through the sperm ducts and mixes with fluids produced by the glands. The tube inside the penis that carries urine or semen is called the urethra; these two fluids can’t be mixed up due to a ring of muscle which prevents it from happening. The function of the penis is to pass urine out of the body and also pass semen into the woman’s vagina during sexual intercourse.
The ovaries contain hundreds of undeveloped female sex cells called egg cells; women are born with these cells in their bodies. The ovaries are connected to the uterus by a tube called a fallopian tube. Each month an egg is released from an ovary it then develops and becomes mature. The uterus is where a baby develops until birth. At the the lower end of the uterus there is a ring of muscle called the cervix which keeps the baby in place whilst a woman is pregnant.
The menstrual cycle
The menstrual cycle relates to the female reproductive system and is the time from the first day of a woman’s period to the day before her next period, this occurs every 28 days. In each cycle, rising levels of oestrogen cause the ovary to develop an egg and release it; the womb lining also starts to thicken. The egg travels down the fallopian tubes after
The reproductive system is the system of organs and parts which function in reproduction. The major function of the reproductive system is to ensure survival of the species. The male reproductive system consists of these parts; Testes, glands, sperm ducts, urethra and the penis. The female reproductive system consists of these parts; Ovaries, egg tubes, uterus, cervix and the vagina
The scrotums function is to produce millions of male sex cells (sperm) and to make male sex hormones which affect the way a man’s body develops. The sperm produced by the scrotum then passes through the sperm ducts and mixes with fluids produced by the glands. The tube inside the penis that carries urine or semen is called the urethra; these two fluids can’t be mixed up due to a ring of muscle which prevents it from happening. The function of the penis is to pass urine out of the body and also pass semen into the woman’s vagina during sexual intercourse.
The ovaries contain hundreds of undeveloped female sex cells called egg cells; women are born with these cells in their bodies. The ovaries are connected to the uterus by a tube called a fallopian tube. Each month an egg is released from an ovary it then develops and becomes mature. The uterus is where a baby develops until birth. At the the lower end of the uterus there is a ring of muscle called the cervix which keeps the baby in place whilst a woman is pregnant.
The menstrual cycle
The menstrual cycle relates to the female reproductive system and is the time from the first day of a woman’s period to the day before her next period, this occurs every 28 days. In each cycle, rising levels of oestrogen cause the ovary to develop an egg and release it; the womb lining also starts to thicken. The egg travels down the fallopian tubes after