Respiration: Essential Life Process
Respiration is a fundamental life process involving the oxidation of nutrients to release energy, similar to burning. It occurs in two stages - anaerobic and aerobic, producing carbon dioxide and water as final products. The respiratory system in humans facilitates gas exchange in the lungs, crucial for breathing and blood circulation. Explore the details of respiratory anatomy, gas exchange processes, and the content of inhaled and exhaled air through this comprehensive guide.
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Presentation Transcript
RESPIRATION 1. Respiration basic life process 1. Respiration basic life process 2. Respiratory system in humans 2. Respiratory system in humans 3. Gas exchange in lungs 3. Gas exchange in lungs 4. Content of inhaled and exhaled air 4. Content of inhaled and exhaled air 5. Breathing and blood circulation 5. Breathing and blood circulation
Respiration basic life process Essence of respiration: Oxidation of nutrients Energy release ...similar to burning
Respiration basic life process Summary: Food (mainly glucose) burns using oxygen Useful energy is released AG00328_ Final products are carbon dioxide and water
Respiration basic life process Summary... GLUCOSE Oxygen Energy Carbon dioxide and water
Respiration basic life process Respiration as katabolic process in the cells runs in two stages... Glucose ANAEROBIC ENERGY PYRUVATE Oxygen AEROBIC ENERGY Carbon dioxide and water
Respiratory System Nasal cavity Oral cavity Epiglotis Pharynx Larynx CENTRAL Bronchi AiR PASSAGEWAYS RESPIRATORY ORGAN Trachea Left lung Pleura Bronchioles Alveoli Right lung
Gas exchange in the lungs Important factors for the gas exchange: 1) The big total surface area of the alveoli 2) Moistened internal surface of alveoli 3) Permeability of their walls In the lungs each bronchus branches into smaller bronchi, which branch into even smaller bronchi that in turn branch into bronchioles. They expand into thin-walled sacs called alveoli. The clusters of alveoli are surrounded by networks of tiny blood vessels. They have thin walls and gasses pass by diffusion. The O2gets in the blood and CO2moves from the blood to the alveoli .
The two gasses pass by the means of DIFFUSION from places with higher concentration to places with lower concentration . Gas exchange CO2
Content of inhaled and exhaled air Inhaled air Exhaled air 4% 0.03% Oxygen 17% 21% Nitrogen Carbon dioxide 78% 78%
14/02/2025 Respiration and Blood circulation 1) From the heart blood goes to the lungs where blood is oxygenated 2) Blood rich in O2 backs into the heart 3) The heart pumps blood to the internal organs. 5) Deoxygenated blood backs into the heart and the cycle starts again . 4) and to the other parts of the body ( brings O2to the cells and takes from cells CO2)
Educational Science Resource created by Irina Kostadinova - biology and health education teacher Second English Language School "Thomas Jefferson Sofia, Bulgaria 11
