Organs
Body System
Size and Strength
Staying Healthy
Starts With The Letter "B:
100

The organs we use to breathe

What are the lungs?

100

The heart is the main pump in this human body system

What is the circulatory system?

100

The human mouth produces about one liter of this each day

What is saliva?

100

You should drink this to stay healthy

What is water?

100

The most common human eye color

What is brown?

200

The organ in the human body that pumps blood

What is the heart?

200

This human body system defends your body against harmful bacteria and viruses

What is the immune system?

200

This part of the human body can detect over 1 trillion scents

What is the nose?

200

It is important to keep your body neat and clean by practicing good daily H_G_E_E

What is hygiene? 

200

The most common human hair color globally

What is black?

300

Largest organ in the human body

What is skin?

300

The lungs exchange oxygen and carbon dioxide when you breathe in this human body system

What is the respiratory system?

300

Hardest substance in the human body

What is enamel?

300

Kids need about 9 -12 hours of this every night

What is sleep?

300

The human heart pumps this red liquid around the body

What is blood?

400

bean-shaped organs in your back, about the size of your fist, and they filter your blood about 40 times per day, to make urine, which gets rid of waste

What are the kidneys?

400

This human body system breaks down the food we eat into nutrients that our body can use

What is the digestive system?

400

Longest bone in the human body

What is the femur?

400

This is what you do every time you use the bathroom to prevent the spread of germs

What is wash your hands?

400

The human skeletal system has many of these 

What are bones?

500

The body's control center, weighing about 3 pounds and containing about 100 billion neurons

What is the brain?

500

This human body system is your body’s communication center, sending messages back and forth between our brain and body

What is the nervous system?

500

The most flexible muscle in the human body

What is the tongue?

500

The human body should do 60 minutes of this daily to stay healthy

What is exercise?

500

An incredible small single celled organism, that can make you sick

What is bacteria?