NCERT Book Class 12 Biology Chapter 2 Human Reproduction

CHAPTER 2

HUMAN REPRODUCTION

2.1 The Male Reproductive
System

2.2 The Female Reproductive As you are aware, humans are sexually reproducing and
System viviparous. The reproductive events in humans include
formation of gametes (gametogenesis), i.e., sperms in males
2.3 Gametogenesis and ovum in females, transfer of sperms into the female
2.4 Menstrual Cycle genital tract (insemination) and fusion of male and female
gametes (fertilisation) leading to formation of zygote. This
2.5 Fertilisation and
is followed by formation and development of blastocyst
Implantation
and its attachment to the uterine wall (implantation),
2.6 Pregnancy and Embryonic embryonic development (gestation) and delivery of the
Development baby (parturition). You have learnt that these reproductive
events occur after puberty. There are remarkable
2.7 Parturition and Lactation
differences between the reproductive events in the male
and in the female, for example, sperm formation continues
even in old men, but formation of ovum ceases in women
around the age of fifty years. Let us examine the male and
female reproductive systems in human.

2.1 THE M ALE REPRODUCTIVE SYSTEM
The male reproductive system is located in the pelvis region
(Figure 2.1a). It includes a pair of testes alongwith
accessory ducts, glands and the external genitalia.