human body quiz

What is the smallest unit of life in our bodies?

• Organs

• Cells

• Tissues

• Systems

What does the heart pump around the body?

• Nutrients

• Water

• Air

• Blood

Where does digestion begin?

• Large intestine

• Small intestine

• Mouth

• Stomach

What is the main function of the excretory system?

• To digest food

• To produce hormones

• To pump blood

• To remove waste

What is the largest organ of the human body?

• Heart

• Skin

• Brain

• Liver

What system helps protect the body from pathogens?

• Circulatory system

• Lymphatic and immune system

• Nervous system

• Digestive system

Which type of muscle tissue is found in the heart?

• Skeletal

• Smooth

• Cardiac

• Elastic

What is the main function of the nervous system?

• To coordinate actions

• To remove waste

• To transport oxygen

• To digest food

What is the primary function of the respiratory system?

• To protect internal organs

• To intake oxygen and expel carbon dioxide

• To remove waste

• To produce blood cells

How many bones are in the adult human body?

• 206

• 187

• 305

• 150