NCERT Solutions for Class 12 Biology Chapter 3 Human Reproduction

 

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NCERT Solutions for Class 12 Biology Chapter 3 - Human Reproduction:  As you know,  humans are viviparous and reproduce sexually. The reproductive events in humans include the formation of gametes which is called as gametogenesis, that is, sperms in males and ovum in females, transfer of sperms into the female genital tract (insemination) and fusion of male and female gametes (fertilisation) leading to the formation of zygote. This is followed by the formation and development of blastocyst and its attachment to the uterine wall (implantation), embryonic development (gestation) and delivery of the baby (parturition). In NCERT Class 12 Biology Chapter 3 - Human Reproduction, you will study the general principles about the reproductive processes in living organisms and their explanation in details with related and representative examples.

Male Reproductive System-

  • The male reproductive system is composed of a pair of testes, the male sex accessory ducts and the accessory glands and external genitalia.
  • Each testis has about 250 compartments called testicular lobules, and each lobule contains one to three highly coiled seminiferous tubules.
  • Each seminiferous tubule is lined inside by spermatogonia and Sertoli cells.
  • The spermatogonia undergo meiotic divisions leading to sperm formation, while Sertoli cells provide nutrition to the dividing germ cells.

Female Reproductive System-

  • The female reproductive system consists of a pair of ovaries, a pair of oviducts, a uterus, a vagina, external genitalia, and a pair of mammary glands.
  • The ovaries produce the female gamete (ovum) and some steroid hormones (ovarian hormones).
  • Ovarian follicles in different stages of development are embedded in the stroma.
  • The oviducts, uterus and vagina are female accessory ducts.
  • The uterus has three layers namely perimetrium, myometrium and endometrium.

Here are the important topics of NCERT Class 12 Biology Chapter 3 - Human Reproduction:

3.1 The Male Reproductive System

3.2 The Female Reproductive System

3.3 Gametogenesis

3.4 Menstrual Cycle

3.5 Fertilization and Implantation

3.6 Pregnancy and Embryonic Development

3.7 Parturition and Lactation

You have learned that these reproductive events occur after puberty. There are remarkable differences between the reproductive events in the male and in the female, for example, sperm formation continues even in old men, but the formation of ovum ceases in women around the age of fifty years.

After going through this chapter line by line, you must have understood all the concept of NCERT Class 12 Biology Chapter 3 - Human Reproduction. Now for your practice, try to solve the NCERT Questions of Class 12 Biology Chapter 3 that is Human Reproduction given below:

  • Q 1. What are the major components of seminal plasma?
  • Q 2. What are the major functions of male accessory ducts and glands?
  • Q 3. What is oogenesis? Give a brief account of oogenesis.

If still you have any doubt, or unable to solve the question mentioned in the NCERT then go through the NCERT Solutions for Class 12 Biology Chapter 3 - Human Reproduction. It will help you to understand the concept behind the questions and also help you to prepare for the other competitive exam like NEET, AIIMS and JIPMER (along with the board), as NCERT is the base for any kind of exam.

NCERT Solutions for Class 12 Biology Chapter 3 Human Reproduction: Solved Exercise Questions

NCERT Solutions class 12 – Biology

Chapter 1

Reproduction in organisms

Chapter 2

Sexual Reproduction in Flowering Plants

Chapter 4

Reproductive Health

Chapter 5

Principles of Inheritance and Variation

Chapter 6

Molecular basis of inheritance

Chapter 7

Evolution

Chapter 8

Human health and disease

Chapter 9

Strategies for enhancement in food production

Chapter 10

Microbes in Human Welfare

Chapter 11

Biotechnology: Principles and Processes

Chapter 12

Biotechnology and its applications

Chapter 13

Organisms and Populations

Chapter 14

Ecosystem

Chapter 15

Biodiversity and Conservation

Chapter 16

Environmental Issues

NCERT Solutions for Class 12- Subject wise

NCERT solutions for Class 12 Maths

NCERT solutions for Class 12 Chemistry

NCERT solutions for  Class 12 Biology

NCERT solutions for Class 12 Physics

 

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