Copyright

Human Life Cycle Lesson for Kids

Instructor: Tamira Butler-Likely

Tamira has taught college Science and has a PhD in Biochemistry.

The steps of growth that all humans go through are called the human life cycle. In this lesson, we will learn more about the six different stages of the human life cycle: prenatal, baby, childhood, teenage, adulthood, and elderly.

The Human Life Cycle

Today, the average American lives to be 79 years old, though human life expectancy is different depending on where you live and other factors. During these years, most people go through the six stages of the human life cycle, which starts at the prenatal stage when fertilization takes place and ends with death. Let's learn more about the six main stages of life.

Prenatal Stage

Just like flowers grow from seeds that have been fertilized, so do humans! In humans, the seed is called an egg, and the fertilizer is called a sperm. When the egg and sperm combine, they form a zygote, which is smaller than the period at the end of this sentence. Over 40 weeks, the zygote grows into a fetus the size of a small watermelon. All this time, the fetus has been in its mother's womb. Now, it's time for the fetus to enter the world and begin the baby stage.

A fetus in the womb
Human fetus

Baby Stage

The baby stage lasts from birth to age one. Babies can't walk or talk yet, so they cry to communicate when they need something. As they baby's body and brain grow, the baby will start to move around on their own. At 6-8 months old, most babies can sit up and crawl. By one year old, babies usually have several teeth and are trying to talk.

Childhood Stage

If you're 12 or younger, you're in the childhood stage right now! Ages 1-12 make up the childhood stage, and this is when a lot of changes happen with our brains. We learn how to talk in complete sentences, how to feed ourselves, and how to read and write. Childhood is probably the most important stage in the human life cycle. Everything you learn and the habits you pick up will usually stay with you for the rest of your life.

Teenage Stage

The teenage stage, ages 13-18, is when a lot of changes happen with our bodies. The time when these changes happen are called puberty. Hair starts to grow in places that never had it before, our voices change, and the shape of our bodies change. Being a teenager can be a little rough as you get used to your new self--but remember, it won't last forever!

To unlock this lesson you must be a Study.com Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use Study.com

Become a Study.com member and start learning now.
Become a Member  Back
What teachers are saying about Study.com
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create An Account
Support