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In Human Beings,Sexual Reproduction is used to reproduce
We know that in Sexual Reproduction,
Male and Female Gametes Fuse to form Zygote.This Zygote later develops into New Individual
Steps
- In males, Testes produce male gametes called Sperms
- In females, Ovaries produce female gametes called Eggs (or Ova)
- Nuclei of Sperms and Ova fuse (combine). This process is called fertilization
- After fertilization, zygote is formed (fertilized egg is called zygote)
- Zygote cells divides repeatedly to form ball of cells
- These ball of cells form tissues and organs,This is called embryo
- Embryo further develop in wall of uterus
- When all body parts of embryo can be fully identified, it is called foetus
- When foetus is ready, mother gives birth to baby
Difference between Zygote, Embryo and Foetus
|
Zygote |
Embryo |
Foetus |
|
Fertilized egg formed by fusion of male and female gametes is called zygote |
When zygotes divides itself to form ball of cells,it is called embryo |
It is the stage of the embryo when all the body parts can be identified |
|
It is a single cell |
It is a group of cells |
It contains millions of cells developed to form tissues and organs |
|
It is beginning stage of formation of baby |
It is second stage of formation of baby |
It is a final stage when offspring(baby) is about to be born in a few months |
What are Male Reproductive Organs?
There are 3 main reproductive organs
- Pair of Testes
- Sperm Duct
- Penis
We know that male sex cells (gametes) are sperm
- Sperm are made by testes.Males have a pair of testes(2 testes)
- These sperm are transferred through sperm ducts
- Sperms are finally released through penis
What are Female Reproductive Organs
There are 4 main reproductive organs
- Ovaries
- Oviducts(Fallopian Tube)
- Uterus
- Vagina
Ovaries produce eggs or ova
Oviducts are tubes near ovaries
Uterus is a bag like organ where development of baby takes place
Vagina is an opening from where male gametes(sperms) reach body
Procedure for Reproduction in Humans
Male sperm cells enter the body through vagina
They go into uterus and from their into oviducts
Ovaries produce egg or ova
Ovaries release single egg every month to oviduct
In oviduct,one of male sperm cells fertilize with the ova to form zygote
Zygote multiples repeatedly to form embryo
Embryo develops into foetus in few months in uterus of the female
After few months, baby is formed
Questions
NCERT Question 2 - Describe the the process of fertilization in human beings.
NCERT Question 7 - In which female reproductive organ does the embryo get embedded?
NCERT Question 4 (i) - Indicate whether the following statements are True (T) or False (F):
A zygote is formed as a result of fertilization. (T/F)
NCERT Question 4 (j) - Indicate whether the following statements are True (T) or False (F):
An embryo is made up of a single cell. (T/F)
NCERT Question 10 (2) - Complete the cross-word puzzle using the hints given below
Sperms are produced in these male reproductive organs.
NCERT Question 10 (8) - Complete the cross-word puzzle using the hints given below
Eggs are produced here
