Sexual Development
Sexual Development
SEXUAL DEVELOPMENT
Development of sex organs: The physical and sexual development takes place more or less at the same time during puberty. The sex organs of boys and girls start developing. Testes in boys mature. They start producing semen. In girls, the reproductive organs are strengthened. The ovaries enlarge and the production of ova begins. The ovaries release mature ova. The girls start their monthly menstruation.
Development of secondary sexual characters: The development of secondary sexual characters also takes place. It starts in boys with the appearance of public and facial hair. In girls, the breasts start developing and the appearance of public hair takes place. Body hairs also become prominent.
Change in hormonal balance: Most of the changes that occur in adolescents are controlled by hormones. Hormones are the chemical substances produced and secreted by the endocrine glands. Hormonal balance in adolescents shifts strongly towards an adult state. This is triggered by the pituitary gland. Pituitary secretes hormones which influence the production of testosterone from testes in boys and estrogen and progesterone from ovaries in girls. These hormones are released into the blood stream and start the rapid maturation of the gonads (sex organs).
The reproductive phase in human beings: Humans become capable of reproduction when their testes and ovaries begin to produce gametes- the sperms and ova. The males produce gametes for a longer duration in their life as compared to females. In females, the ovaries become active when the girl reaches puberty, i.e. between 11-13 years of age. One ovum in one of the ovaries becomes mature once in about 28 days. The mature ovum enters the oviduct where it may get fertilized. If fertilized, it develops and reaches the uterus that is a pear- shaped structure present between the ovaries. Uterus is muscular and elastic and can grow, stretch and expand many times its size when the foetus grows and develops inside it.
Before the embryo enters the uterus, the uterus prepares itself to receive it by forming a thick lining of blood vessels. If fertilization does not occur, the egg disintegrates and the lining of blood vessels is shed off. This process of blood flow is termed as menstruation. It lasts 3-6 days. The first menstrual flow that begins in a girl at puberty is termed menarche.
The menstrual cycle stops when the woman is 45-50 years of age. This is termed menopause. In general, menstruation occurs regularly at intervals of 28-30 days. However, this period is variable. It may take about 6 months to one year for a girl’s menstrual periods to become regular, but this should not cause any worry. If the ovum is fertilized by the sperm, a zygote is formed that begins to divide and gets embedded in the uterus for further development.
Sex hormones control the onset of puberty and initiate the reproduction dunction. Body changes in male such as the growth of facial hair and cracking of voice, are initiated due to the secretion of testosterone. Body changes in females during puberty, such as brest development, are initiated by estrogen. During puberty, the tests begins to secrete the testosterone hormone. This hormones bring about the physical changes that make a boy look like an adult male. These changes are called male secondary sexual characteristics. Similarly, in girls during puberty the ovaries begin secreting the hormones called estrogen and progesterone. These hormones develop female sexual features. Pituitary gland is small (about 0.5 grams in weight ) pea sized gland, present in brain. It secretes various hormones in blood, which stimulate the target sites ( tests and ovaries) to secrete their hormones.
Reproductive phase of life in humans:
The phase in individuals life during which there is reproduction of gametes is called reproductive phase. In femalse, it is between 13 to 50 years and in males, it is from the age of 13, to life-long. The reproduction of gametes starts earlier in females than in males.The menstrual cycle is controlled by a number of glands and a series of hormonal changes beginnign in the brain.
Which of the following are the secondary sexual characters ? | |||
| Right Option : A | |||
| View Explanation | |||
Whoich of these is not a secondary sexual charcterstic? | |||
| Right Option : C | |||
| View Explanation | |||
Reproductive life of a women last from _____________ to __________________. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
Abhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
