Exploring the Human Body

What is the primary function of the skeletal system?

• To support the body and enable movement

• To produce blood cells

• To protect internal organs

• To provide a shape to the body

How does the nervous system send messages throughout the body?

• Using nerve cells called neurons

• By muscular contractions

• Through blood flow

• Via the skeletal system

What is the main role of the heart in the circulatory system?

• To filter blood

• To pump blood throughout the body

• To absorb nutrients

• To produce blood cells

What do the kidneys remove from the blood?

• Oxygen

• Waste products

• Nutrients

• Carbon dioxide

What is the main purpose of the urinary system?

• To control body temperature

• To circulate blood

• To remove waste from the blood

• To digest food

Where does gas exchange occur in the respiratory system?

• In the trachea

• In the bronchi

• In the diaphragm

• In the alveoli

Which system is responsible for oxygenating blood?

• Nervous system

• Digestive system

• Circulatory system

• Respiratory system

What is the first part of the digestive system that food enters after being swallowed?

• The esophagus

• The large intestine

• The small intestine

• The stomach

What helps the stomach break down food?

• Enzymes from the pancreas

• Gastric juices

• Saliva

• Bile

What triggers the production of saliva?

• Chewing food

• Digesting food

• Seeing or smelling food

• Swallowing food