Reproduction in Animals

• The process through which the production by living beings takes place to produce more living organisms of the same kind is known as Reproduction. 

Mode of Reproduction

1. Asexual Reproduction

• When a single parent is involved in the process of reproduction then it is known as Asexual reproduction
• Example – microorganisms.

2. Sexual Reproduction

• Sexual reproduction is a process in which two individuals are involved and a new individual is produced.
• Example – Tiger, Human.

Sexual Reproduction

• The reproductive parts and organs in male and female are different in case of animals.
• Zygote is produced by Gametes which are developed by the reproductive parts in animals.
• A new individual is developed with the zygote.

Reproductive organs in Humans

1. Male reproductive organs

• A pair of testes
• Two sperm ducts
• One penis

2. Male reproductive organs

• A pair of ovaries
• Uterus
• Oviducts

Fertilization

• Fertilization takes place with the fusion of male gamete and female gamete.
• Zygote develops after the process of fertilization.
  

   

Types of Fertilization

1. Internal Fertilization

• This fertilization takes place inside the body of animals.
• Examples are dogs, humans, cows and hens.

2. External Fertilization

• When the fusion of male and female gamete takes place outside the body of the animal, then external fertilization takes place.
• Examples are starfish, fish, etc.

Young ones to adults

1. Direct Development

• When the young animals develop into an adult then the process is called as direct development.
• Examples are Monkey, men, hen, etc.

2. Indirect Development

• When the young one do not look like or resembles the adult one, then it is said to be an Indirect Development.
• Examples are silk moth, butterfly, frog, etc.

Asexual Reproduction

1. Budding

• This process takes place in the multicellular organisms.
• A bud gets developed and starts living as an individual after getting detached from the parent.
• Examples are sponges and hydra.

2. Binary Fission

• In unicellular organisms, this method is found.
• Two daughter cells are developed in this process each with a nucleus and later become a complete adult.
• Examples are Leishmania, paramecium, etc.

Recap

• The process through which the production by living beings takes place to produce more living organisms of the same kind is known as Reproduction.
• When a single parent is involved in the process of reproduction then it is known as Asexual reproduction
• Sexual reproduction is a process in which two individuals are involved and a new individual is produced.
• Fertilization takes place with the fusion of male gamete and female gamete.