reproduction in animals

• What Is Reproduction?• Importance Of Reproduction.• Types Of Reproduction.• Male And Female Reproduction Organs.• Stages Of Sexual Reproduction.• Asexual Reproduction.

What Is Reproduction???

Reproduction is a process by which living things give birth to a new generation of organisms of the same kind.

Importance

Reproduction is important because without it, a species would not survive over time. Individuals must reproduce to ensure that they will continue on over generations of time.

Types

• Asexual Reproduction: The reproduction in which offspring are produced by a single parent, without the union of sex cells, is called asexual reproduction.

• Sexual Reproduction: The reproduction in organisms by the union of male and female sex cells(gametes) is called sexual reproduction.

Male Reproduction Organs

Female Reproduction Organs

Stages Of Sexual

Reproduction

Stage 1: Fertilization

• The fusion of the genetic material contained in the gametes to form a zygote is known as fertilization.

• Zygote is the fertilized egg or ovum. It is a single cell, thus we begin our life as a single cell.

Types Of Fertilization

• Internal fertilization: Fertilization which takes place inside the body of the female. E.g., Humans, Dogs, Cows, Birds, etc.

• External fertilization: Fertilization which takes place outside the body of the female. E.g., Fish, Frogs, etc.

Stage 2: Development Of Zygote

• Zygote divides repeatedly to give rise to a ball of cells. As it passes from the fallopian tube into the uterus it divides further and develops into an embryo.

• When the embryo gets embedded in the wall of the uterus it is known as implantation. The female is then said to be pregnant or to have conceived.

• The embryo gradually develops body parts and is called as foetus.

• When the development of the foetus is complete the mother gives birth to a baby.

Stage 3: Birth Of Young Ones

• Animals which give birth to young ones directly are called viviparous animals. The embryo obtain nourishment from mother.

• Animals which lay eggs are called oviparous animals. The embryo obtains nourishment from the yolk and albumin present in the egg itself.

• The time between fertilization and birth of young one is called gestation period.

Stage 4: Young Ones To Adults

The natural process by which an animal, after birth or hatching, undergoes abrupt changes in its body structure until it reaches an adult stage is called metamorphosis.

Metamorphosis

Asexual Reproduction

BuddingBinary Fission

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Made By:Rahul Chawla

VIII B