2 The male reproductive system is designed to: 1. produce male gametes (sperm)2. for the insertion of viable sperm into the female (intercourse)Once the sperm are inside the female they can swim to find the female egg (ovum) and fertilization takes place
4 The vas deferens carries the sperm from the epididymis to the urethra
5 The seminal vesicles produce sugars to feed the sperm on their journey to the ovum
6 The prostate gland produces an alkaline (opposite of an acid) solution The prostate gland produces an alkaline (opposite of an acid) solution. The alkaline solution neutralises the acid in the woman’s vagina
7 The bulbo – urethral gland produces a liquid containing mucus for the sperm to swim in
8 SEMENSemen is a milky white fluid produced when a man ejaculatesIt contains:1. Sugars from the seminal vesicles provide food for the sperm.2. Alkaline fluid from the prostate stops the acid in a woman’svagina from killing the sperm before they get to the egg.3. Mucus from the bulbo - urethral gland gives the sperm ssomething to swim in, and helps to dilute the acid in thevagina.4. Sperm from the testes
9 The testes produce the sperm and they produce testosterone
10 The epididymis is a tube at the end of the testes The epididymis is a tube at the end of the testes. This is where the sperm mature after the are made in the testes.
11 The scrotum is a skin bag surrounding the testes The scrotum is a skin bag surrounding the testes. It acts as a temperature control for the testes, hanging away from the body when the body is hot, and close to the body when the body is cold
12 The role of the penis is to enable the sperm to get into the woman’s vagina To do this it is able to become hard and erect if it is stimulated.
13 To enable the penis to become erect two special tissues are needed. 1 To enable the penis to become erect two special tissues are needed. 1. Spongy erectile tissue fills with blood and expands so the penis grows bigger.
14 2. Erectile muscle contracts when a man becomes sexually excited, allowing the penis to become erect
16 The bladder stores urine till the man is ready to expel it from his body
17 The urethra is the tube that connects 1 The urethra is the tube that connects 1. the bladder to the outside of the body 2. the vas deferens to the outside of the body
18 This picture shows the position of the rectum relative to the man’s genitals
19 SummarySperm are made in the testesThey mature (and are stored) in the epididymisThey travel to the urethra through the vas deferensAt the urethra the sperm is mixed with the semen (the sugars, alkaline liquid and mucus)When a man become sexually excited the spongy erectile tissue fills with blood, making the penis biggerThe erectile muscle contracts making the penis erectAt orgasm the prostate, vas deferens and epididymis contract pushing the semen (with the sperm) out of the man’s body along the urethra. This is called ejaculationDuring ejaculation the bladder seals closed so that urine is not mixed with the semen