Page 33 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

2. RESPIRATION
(The energy releasing system)

 The term ‘Respiration’ comes from a latin word ‘Respire’ meaning Lesson related 1, 2, 4 marks
Activities Question and
‘to breath’. videos Answers PDF
pl.scan QR
 Respiration is the process by which food is broken down for the release pl.scan QR
of energy.

C H O  6 O 
6 12 6 2
(
6 CO  6 H O 38 ATP energy)

2 2 Cellular respiration
Cell
Internal

Blood respiration respiration
  Transport of gases
through blood
External

Lungs

Breathing   Breathing is a process

of inhaling and exhaling

Atmospheric air

Human Respiratory System

Nostrils :  These are the openings of the respiratory system.
 Air usually enters the body through the nostrils.
Nasal cavity : Nostrils opens into nasal cavity.
 Due to hairs present in nasal cavity air is filtered.
 The lining of the nasal cavity contains moist surface.

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