200
Some white blood cells make substances called __________ that kill micro-organisms.
Substance produced in the liver that breaks down fat and helps neutralise excess stomach acid.
The act of taking air in and out of the lungs.
Flow of blood around the body.
Hair shaped structures in the nose and throat that trap dust before it reaches the lungs.
Absence of certain minerals or vitamins.
Muscular organ used in breathing.
A medical condition that causes illness.
(Pronounced em-fee-see-ma) A lung disease causing shortness of breath.
Light, sound, heat, kinetic, electrical and chemical are all forms of ______.
Muscular organ that pumps blood around the body.
An organism that can only be seen under a microscope.
A tissue that contracts to cause movement.
Organ that takes oxygen from the air and returns carbon dioxide to the air.
Chemical found in vegetables, fruit and cereals that help your body to work efficiently.
The process of obtaining the food necessary for health and growth.