The document discusses respiration and the processes of inhalation and exhalation. It defines respiration as the breakdown of organic matter to produce energy. Respiration can be aerobic, using oxygen, or anaerobic, without oxygen. Breathing, also called external respiration, is the process of inhaling oxygen and exhaling carbon dioxide. During inhalation, muscles contract to expand the lungs and lower their pressure, allowing air to rush in. During exhalation, muscles relax and lungs contract, raising their pressure and expelling air.

1. Inhalation and exhalation
Submitted to – Dr Abha Mishra
Submitted by –Raghvendra Niranjan

2. Respiration
• The process in the organism in which complex
organic matter decompose in the presence or
absence oxygen which result in the formation
of carbon dioxide and water or simple organic
matter and carbon dioxide and release of
energy ,called respiration.
• In this process,oxidation of food substances
occurs inside the mitocondria

3. Respiration type
• Anaerobic respiration
• Aerobic respiration
•
• Aerobic respiration divide into following
• 1-External respiration (breathing)
• 2-internal respiration (cellular respiration)

4. Breathing (external respiration)
• The process in which oxygen is taken into the
body and carbon dioxide is forced out from
the body .
• Breathing is divided into following
• 1-inspiration or inhalation (oxygen inhaled)
• 2- expiration or exhalation (carbon dioxide
released )

5. Inhalation or inspiration
• external intercostal muscle contract .
• Ribs pulled upward and outward .
• Diaphragm contract.
• Thoracic cavity increases ,lungs expand .
• Air pressure inside the lung decreases.
• To balance the air pressure ,air rushes into the
lungs through air passage.
• This process needs energy for muscle contraction
• This process does not reqiure energy .

6. Inspiration and expiration

7. Exhalation or expiration
• Internal intercostal muscle contract
• Ribs pulled back their normal position
• Diaphragm relax
• Thoracic cavity decreases , lung contract
• Air pressure inside the lung increase
• Equilize the air is expelled out from lungs through
respiratory tract
• This process does not require energy
•Thanks