The Reproductive System
The male and female reproductive systems are different with both
having specific roles.
The Male Reproductive System
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The main structures of the male reproductive system are the testes,
the penis and several glands. Male sperm carries genetic information
and are produced continually from the start of puberty. The primary
spermatocyte divides by meiosis make two secondary spermatocytes and
then four, which have half the amount of chromosomes as the mother
cell (46 in humans) therefore sperm (spermatozoa) has 23 chromosomes
(genetic information).
Sperm produced in the testes in a sac called the scrotum is 3°C cooler
than normal body temperature as they hang down between the legs. Sperm
does not develop well at 37°C.
Seminiferous tubule coiled tightly in the testes make up several
hundred compartments and here sperm cells are produced by the sertoli
cells. It takes two months for the full production of a sperm cell and
several hundred million are made each day. Those that are not
ejaculated are broken down and absorbed into the body.
Testosterone is secreted from cells in the testes. All cells in the
testes for normal function require hormones, these are a combination
of pituitary hormones called FSH (follicle-stimulating hormone) and LH
(luteinizing hormone).
After its manufacture sperm is delivered to a long coiled tube called
the epididymis where it matures and stays there for at least 18 hours
before their mobility develops. Once this has taken place sperm then
passes along to another tube called the vas deferens where it is
stored. During intercours...
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...enta, the
lifeline between mother and offspring. Through this organ the foetus
gains all its needs and disposes of all its waste. Extensive changes
occur in almost all of the systems in a woman's body during pregnancy.
If conception does not occur preparations, in the form of a series of
changes each month, are abandoned. The materials that are produced
each month are scrapped and a fresh cycle begins, preparing again for
conception. This regular sequence is termed the menstrual cycle
because of the discharge of fluid (menses) occurring via the vagina at
regular intervals. The events of this cycle are divided into four
stages: -
1 Menstrual
2 Follicular
3 Ovulatory
4 Luteal
Phase 3, which is mid cycle, is the time that the ovum is released
from the ovary (this is what is known as ovulation).
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The testes are the primary reproductive organs in the male; they are responsible for the production of sperm. The testes are responsible for the production of testosterone, and are almost nonexistent prior to puberty. Testosterone affects vary to the sound of your voice to hair baldness. The epididymis is a firm structure that consists of three parts, sperm that passes through the epididymis after they are formed. The male urethra is approximately 18-20 cm long. The urethra allows the passage of both urine and sperm. There are two main parts of the penis; the root and body. The three main parts of the root of the penis are, the midline bulb, and the left and right crura on either side of the bulb. While the body is formed by three cylindrical masses of erectile tissue, they are the corpus spongiosum in the midline, and the two-corpus cavernosa on either side. The urethra leaves the head of the penis at the end of the corpus spongiosum.
Throw away those abstinence rings and listen up teens! From ages twelve and up, us “young adults” have had adults pestering us to death about sex and all the drawbacks of having it. Well, to hell with that nonsense, sex isn’t as bad as it’s made out to be. Adults are quick to mention gonorrhea, syphilis, and of course that unwanted pregnancy. Yet what they fail to mention is the facts. In reality sex has many known health benefits that can boost a teen’s happiness and overall self-esteem which in turn helps relieve the stress from a teen’s everyday life.
The skeletal system helps with endocrine regulation, protection, support, movement, calcium storage, and blood cell production. The skeletal system consists of 206 bones, in the adult human body, all of which are divided into two major divisions. One division, the axial skeleton made up from 80 bones, runs along the body’s midline and the other division, the appendicular skeleton which has 126 bones.
When I was little I always wondered why I did not have any siblings. When I got to age ten my mom explained to me that she had endometriosis, a form of infertility. At age ten I did not understand the full meaning, but did understand that it made me become an only child. Now that I am much older and have more knowledge in this field I find it very interesting all the ways a women can develop infertility. Not only are there ways to avoid it but also ways to cope with it. Through the years I saw my parents deal with it and I can tell you it is not easy. Finding out your body is not enough to hold another child is devastating to a woman. Even with In-Vitro and other kinds of fertility supplements it is not the same as your own child. I would love to say there is a cure but unfortunately there is not one yet. Researchers are working hard no doubt but hopefully with time no woman will have to hear the horrible news of having infertility.
These first lines of Mina Loy’s poem “Parturition” indicate the way in which the poet distin-guished herself from other (male) modernist poets: “I am”, writes Loy, and puts a woman in “the centre” of her poem – a poem which has a distinctly female experience as its topic, childbirth. As modernism was a male-dominated literary movement, the experiences of women were largely disregarded but Loy aimed to give the “new woman” a voice and “pre-sented a new female perspective”. In 1914, Loy wrote her “Feminist Manifesto” that speaks out against the inferior position of women in society and stresses the importance of the aban-donment of the traditional view on women. Loy supported her position through her poetry in which she objected the position of women in a male-centred society and presented a new
A male makes one thousand new sperm per second, that is two trillion over a lifetime and they all are one of a kind, very unique. A woman has all her eggs from birth. The process starts out as meiosis, this is where 30,000 genes are then there are forty six chromosomes. Twenty three comes from your mother and twenty three come from your father, they only come together in meiosis in pairs, but they are not the same. Chromosomes make an exact copy of themselves then they condense making an X shape, chromosomes get a partner then embrace. The chromosomes cling close together in big chunks, the cell then divides pulling the pair apart with twenty three chromosomes. The cell alone is incomplete, but holds many promises. Every cell holds di...
...urpose is to clean the urethra of harmful bacteria and other substances prior to ejaculation. The penis, not composed of muscle or bone, is the next step for the sperm. It’s three main purposes are to transport urine, transport semen, and to provide sensation. Inside the penis is the urethra. The urethra’s functions are to carry urine from the bladder to outside the body, and to ejaculate semen during sexual intercourse. The tip of the penis is called the scrotum, and it’s three main functions are to act as a thermometer for the testicles, protect and hold the testicles, and to provide various sensations.
...culatory system. Pituitary gland is a growth hormone that helps in mertabolism and develops reproductive organs. The thyroid controls metabolsim on the rate that the body breaks down food. Adrenal gland secretes many hormones including adrenaline which prepares the body to react in a stressful situation. The pancreas produces digestive enzymes and insulin. Ovaries produce ova and estrogen. Testes produce sperm cells and testosterone. To stay healthy you should get a regular medical check-up, eat a well-balanced diet, sleep at least 8 hours, and decrease stress in your life. Some problems are growth disorders, diabetes, and obesity. Puberty begins at different times for girls then boys. Girls start around ages 9-13 and boys are ages 10-15.