Respiratory System
What is the main function of the alveoli?
Gas exchange (oxygen in, carbon dioxide out)
Which chamber of the heart pumps oxygenated blood to the body?
Left ventricle
Where does most nutrient absorption occur?
Small intestine
Which type of muscle is attached to bones?
Skeletal muscle
Which animal is famous for laughing when it makes noise?
Hyena
True or False: The diaphragm contracts during inhalation.
true
What type of blood vessel carries blood away from the heart?
Arteries
Which organ produces bile?
Liver
What is the function of tendons?
Connect muscle to bone
What snack is known for getting stuck in your teeth?
popcorn
Which structure carries air from the trachea into each lung?
Bronchi
True or False: Veins have valves to prevent backflow.
True
True or False: The stomach is the main site of carbohydrate digestion.
False (carbohydrates begin digestion in the mouth)
Name the type of joint found in the shoulder and hip.
Ball‑and‑socket joint
What everyday object has a face but no eyes, mouth, or nose?
a clock
What gas is removed from the blood by the lungs?
Carbon dioxide
What is the main function of red blood cells?
transport oxygen
Which enzyme in saliva begins the digestion of carbohydrates?
Amylase
True or False: Ligaments connect bone to bone.
True
Which animal sleeps standing up?
horse
During exercise, breathing rate increases. Why?
To supply more oxygen and remove extra carbon dioxide
During physical activity, why does heart rate increase?
To deliver more oxygen and nutrients to muscles
What is the main function of the large intestine?
Absorbing water and forming faeces
What is the name of the tough tissue that covers the ends of bones inside a joint to reduce friction?
Cartilage
What is the only number that has the same number of letters as its actual value?
four 4