Hormones

biology · body systems · chemistry · growth

Chemical messengers. Hormones are special molecules that act like tiny mail carriers zooming through your bloodstream to deliver important instructions to different parts of your body. They tell your organs and tissues what to do, from making you grow taller to helping you feel sleepy at night.

Distant delivery system. Instead of sending signals through nerves like electrical wires, hormones travel the long way through your blood to reach organs far away. This slower delivery system works perfectly for messages that need to last a while, like telling your body to keep growing or stay awake during the day.

Essential for development. You couldn't grow, develop, or become a teenager without hormones. They're absolutely necessary for turning a baby into a kid, a kid into a teenager, and managing all the changes your body goes through at every stage of life.

Work in plants too. Hormones aren't just for animals like us, humans, and dogs. Plants also use hormones to know which way is up, when to bloom flowers, and how to grow toward sunlight.

Control your feelings. Hormones don't just control your body, they also influence your mood, energy level, and how happy or stressed you feel. This is why you might feel extra energetic in the morning and tired at night because of different hormone levels throughout the day.