Vocabulary - Respiration
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Vocabulary
STUDENT RESOURCE 5.1
INFORMATION SHEET
alveoli tiny sacs in the lungs where
larynx the voice box in the throat
oxygen enters the blood and carbon
The larynx contains your vocal cords.
dioxide leaves the blood
When the vocal cords vibrate, you make
Oxygen moves from the alveoli into
sounds.
the bloodstream. Carbon dioxide moves
lung a respiratory organ that moves air
out of the bloodstream into the alveoli.
into and out of the body
bronchi two tubes that connect the
The lungs bring in air that contains
trachea to the lungs
oxygen. They get rid of air that contains
The singular of bronchi is bronchus.
carbon dioxide.
One bronchus leads to each lung. The
photosynthesis the process of using the
bronchi are also called “bronchial
energy in sunlight to make food from
tubes.”
water and carbon dioxide
cellular respiration the process in cells
Plants use carbon dioxide and give
that releases energy
off oxygen during photosynthesis. The
Sugar is broken down during cellular
food that plants make is a kind of sugar
respiration. Both plants and animals
called glucose.
carry out cellular respiration.
trachea the tube that connects the
diaphragm a sheet of muscle below the
mouth and nose with the bronchi
lungs
The trachea is also called the windpipe.
When the diaphragm contracts, your
The larynx is at the beginning of the
lungs breathe in air. When it relaxes,
trachea.
your lungs breathe out air.
HUMAN BODY • SECTION 5 RESPIRATION
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