Human Body Systems

What does the circulatory system help to transport?

• Solid waste

• Oxygen and nutrients

• Electric signals

• Light waves

Where does digestion start?

• In the stomach

• In the small intestine

• In the large intestine

• In the mouth

What does the endocrine system secrete?

• Oxygen

• Nutrients

• Blood

• Hormones

What is the main function of the excretory system?

• Transporting oxygen

• Excreting wastes

• Producing hormones

• Breaking down food

What is the largest organ of the human body?

• Skin

• Heart

• Brain

• Liver

What does the lymphatic/immune system help the body fight against?

• Hunger

• Pathogens

• Dehydration

• Fatigue

What type of muscle tissue is the heart made of?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Elastic muscle

What does the nervous system control?

• Blood flow

• Digestion

• Hormone secretion

• Voluntary and involuntary actions

What is the main function of the respiratory system?

• To protect internal organs

• To move the body

• To intake oxygen and exhale carbon dioxide

• To digest food

How many bones do adults have?

• 187

• 206

• 305

• 150