Sexual Reproduction Lesson for Kids

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  • 0:04 Why Do We Reproduce?
  • 0:39 How Does Reproduction Work?
  • 1:24 How Do Humans Reproduce?
  • 2:02 How Do Animals Reproduce?
  • 2:52 Lesson Summary
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Lesson Transcript
Instructor: Mary Beth Burns

Mary Beth has taught 1st, 4th and 5th grade and has a specialist degree in Educational Leadership. She is currently an assistant principal.

Sexual reproduction is what the human population relies on to avoid becoming endangered or even extinct. Come and learn about why we reproduce, how it works and how different animals engage in reproduction.

Why Do We Reproduce?

Have you ever done something without meaning to? Not like doing something on accident - but rather, automatically reacting to a situation without making the choice to. This is the result of instinct. All living things have instincts, which are natural patterns of behavior. For example, when a baby is born, it automatically has an instinct to drink milk from its mother.

Another natural instinct that we are born with is the instinct to reproduce, or make babies (also known as offspring). Offspring are what keeps our species going. Without offspring, the human race would eventually die off. The way that human beings make babies is through sexual reproduction.

How Does Reproduction Work?

When it comes to sexual reproduction in human beings, you need two things: a male and a female. They are the parents of the future offspring. Each parent comes with their own sex cell that is needed to make the baby. The female has the egg, which is produced inside of her ovary. A female has two ovaries, which are organs inside of her reproductive system.

The male has the sperm, which kind of looks like a tadpole. It is the sperm's job to find the egg in order to fertilize it, which means that the sperm and egg come together to make a completely new organism.

The sperm and the egg will determine what the organism will look like, pieces of its personality and whether or not the organism will have a disability. The sperm is responsible for determining whether the organism will be a male or a female. The organism grows inside of the female and eventually becomes a baby.

How Do Humans Reproduce?

In order for the fertilization process to take place, the male and female engage in sexual intercourse. During sexual intercourse, the male inserts his penis into the female's vagina. A thick, white liquid called semen comes out of the male's penis. This is called ejaculation.

There are millions of tiny sperms swimming in the semen. Sometimes, at least one of the sperm makes it to the egg in order to fertilize. Other times, none of the sperm make it and they just die off.

Sometimes in humans, two sperm will find two different eggs, which develop to become fraternal twins. In other cases, a sperm fertilizes just one egg, but that egg later splits and forms two babies - identical twins.

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