this is john burke class of nineteen forty this is mary burke class is nineteen forty this is john burke jr class of nineteen sixty six according the fond hopes of his parents someday you may be in john burke shoes or in mary burke high heels slippers what are you going to do my mother's bring them into the world where i do johnny by the grace of heaven mothers are the only ones who know how to bring babies into the that's right dads mothers do bring babies into the world but sooner than you might think now your child will be old enough for a full explanation so let's brush up on it you and i and together reveal the human reproductive system a model will help you reveal the fundamentals that the male sex organs as seen from outside consist of several folds of skin or tissue called a lady  these lady a cover the array spread through which urine is that and the entrance to the vagina cutting through this model these organs can be seen as they actually appear in vertical section through the midline called the mucous membranes its walls lie in folds which can be easily stretched a membrane partly covers the entrance to the vagina this is the hymen or maidenhead its absence not mean lack of rigidity and it may be accidentally broken during childhood shown here on the front of you is a small pear shaped organ normally only about half the size of those that they low it is a vagina and connected to it at the top are two to the fallopian tubes and the two ovaries enlarge too many times its original size during pregnancy one end of the fallopian tube is open so that eggs for over from the adjacent overate may easily answer and be carried to the uterus which are responsible for the development of the male characteristics in other parts of the body such as breasts pear and skin but from puberty on the primary function of the older a's is the production of eggs in a closer view we can watch the development of an egg remember that while this one is growing all the others are growing also but usually only one egg reaches maturity and rate twenty eight days after reaching full development it breaks through the ovarian wall and passes into the fallopian to this breaking through of the egg is called the fully developed egg is only one two hundredth of an inch in diameter when mature each egg is capable if fertilized of developing into a baby moreover each all of the hereditary characteristics of the mother since the function of the uterus is primarily that of receiving the fertilized egg and nourishing the developing child the walls undergo regulars by the look preparation for this job the lining of the uterus becomes soft and spongy and engorge with blood and fluids this progresses during the final stages of the development of the egg extrusion from the older a and its passage through the two watch the various elements as a record during each twenty eight day period after the menstrual flow stops about the fourth day the uterine lining begins to build up again meanwhile fertilized it dissolves away or disappears in the two lamb is the structure and function of the female reproductive organs the ovaries which every twenty eight days discharge the uterus which during the same period gets ready to receive the egg in case it is fertilized by contact with the male sperm if fertilization of the eggs does not occur or the egg itself dissolves or disappears although the average menstrual cycle usually occurs every twenty eight days in many cases it may be somewhat longer or shorter because it depends on the proper functioning of many glands its normal time schedule may be easily upset by nervous strain emotion or illness the process is regularly repeated however every twenty eight days on less fertilization of the egg occurs and pregnancy begins these are the facts of the female reproductive system this is the information which you dad should clearly understand before you can pass on correct knowledge to your child when he is old enough to understand there wouldn't be any babies without fathers well your child isn't good as it is one day you'll have to tell him why babies do have fathers and that brings us to the next chapter in our review of the story of reproduction the structure and function of the male reproductive organs the x journal male reproductive organs as shown in this drawing consists of the penis and this growth on this g contains the testicles in a section view we can see that the penis and testicles are connected by a long to this is the arrays broken now it extends from the penis back past the prostate gland and seminal vesicles to join the two bleeding from the testicles in this same diagram we can see also the bladder which empties into the original canal the testicles in men correspond to the ovaries in women because they those are gland in which the reproductive elements are formed if we examine a section of the testicles we find that it is composed of small compartments filled with two kinds of cells one kind produces an internal which is carried in the blood and results in the development of male characteristics such as skin beard voice and body structure the second or lining cells are constantly being changed are the male sex sells these parameters allah or sperm cells are microscopic single cells which are propelled by the lashing motion of their long tails and are stored in the massive curled tube seen here if not empty during sexual intercourse they are periodically empty during sleep in nocturnal emissions are wet dreams where premiums are a perfectly normal body function which is nature's way of getting rid of stored up sperm therefore the common belief that intercourse or masturbation are necessary to relieve the pressure of stored up sperm is absolutely not true millions of spermatozoa are stored ready for during intercourse the penis is in a state of erection this is caused by the spongy tissues of the penis becoming in gorge with blood that sperm passes up through the duct where fluids from the glass and they're added to form the are deposited at the upper end of the vagina near the cervix they begin moving up into the uterus sperm may remain active here for several days tube and approach the egg in this diagram both the egg and the spermatozoa are greatly enlarged in proportion to the size of the organs shown normally fertilization takes the tail drops off the nuclei of sperm and egg merge and the development begins the fertilized egg develops by first splitting into two then into four eight and so on from this fusion of a single egg and as thing those parameters on the child develops these early divisions take place while the fertilized egg is still moving through the as you may recall the uterine wall has during this part of the menstrual cycle then preparing to receive this day the wall is rich with blood and limbs from which the growing organism will draw its nourishment its nesting of the egg against the wall brings about many glandular actions these first causes station of menstruation and then during the course of the exit of element into a baby produce the many secondary physical and physiological characteristics of pregnancy after the first two weeks this fertilized egg enters the embryos de gea the embryo itself lies along the inner margin of the yolk sac and is in turn connected by a stock to the membrane through which food will be absorbed at this time the embryo is still almost microscopic in size but the largest portion is the yolk sac which provides early nourishment the development of the embryo is an interesting and highly complex process during the first four weeks the embryo increases rapidly inside the yolk sac becomes progressively smaller as it is absorbed but mechanism for feeding from the mother has in the meantime been developed at the fourth week buds have appeared where the limbs will develop and the embryo has now taken definite form during the next months the limbs assume more specific shape and the head becomes large as the brain develops the foetus as it is now called resembles most other mammals that a similar stage of gro during the third and fourth months the fetus develops all the human facial characteristics the thing years and tollers and the external sex organs at the end of the fourth month the foetus average is about six inches in length and its heartbeat may be heard for the first time the development from this point on is that of extensive growth and refinement of individual organs and tissues within the uterus the child usually occupies this position here is the billable cord which passes from the child to the placenta commonly called the afterbirth it is through this cord and that nourishment is carried to the growing fetus from the first month to the day of its birth in a closer view of this mechanism we see that no direct connection exists between the circulatory system of the mother and that of the child food is carried in the mother's blood to the uterine wall the placenta carries the bloodstream of the child to close contact with the uterine wall food is carried across the spongy tissue from the mother to the child while waste from the child are similarly path across to the bloodstream of the mother this is the only contact between mother and child there is no common blood stream as this break one lives off as a matter of fact all of the child's blood was formed within its own developing body at full term nine months the child has reached an average length about eighteen inches and an average weight of about six to eight pounds at this stage the child is a completely developed living organism and the better you understand all of these facts the better you will be prepared to discharge one of the greatest responsibilities of parenthood the intelligent education of your child to the fact of human reproduction the best place for that right dad but you also know that an expectant mother requires medical attention from the very beginning of pregnancy because from this time on marked physical changes take place in our body here we see first the normal female figure showing the uterus and vagina as pregnancy continues the uterus becomes more distended with corresponding changes in body contour the stomach intestines the liver and other organs are pushed out of the normal position posture is changed you can also see the enlargement of the breast in preparation for feeding the infant yet as marked as these physical changes appear they are only temporary shortly after childbirth most of them will disappear here in a closer view we see the fully developed child just before birth in the these contractions started long intervals but gradually become regular the greatest contractions occur at the upper end of the uterus so the pressure is directed towards the cervix as the contractions become even more the jainas stretches to permit passage of the child and aided by contractions of the abdominal muscles the child is brought into the world in a normal manner this plan is a story of reproduction a story which any parent should fully understand not only to ensure the arrival of a healthy child but also to cope with the sensitive minds of children your children throughout successive stages in their constant search for knowledge on your answers may well depend the physical and emotional health of future generations i just have little if you have twin boys