respiration in humans Flashcards
flashcards (17 cards)
what is respiration?
the breakdown of food substance to release energy in living things
what are the two types of respiration?
aerobic and anaerobic respiration
what is aerobic respiration?
the breakdown of food substances in the presence of oxygen to release a large amount of energy in living cells
what are the examples of aerobic respiration?
sleeping and walking
what is anaerobic respiration?
anaerobic respiration is the breakdown of food substance in the absence of oxygen to release a small amount of energy
what are the examples of anaerobic respiration?
running and jumping
what are produced in aerobic respiration?
carbon dioxide and water are produced
what are produced in anaerobic respiration?
lactic acid is produced in the muscles
trachea is also known as?
the windpipe
the tiny sacs in the lungs where gas exchange occurs are called?
Alveoli
during inhalation, the diaphragm
moves downward
the gas exhange in the alveoli takes place with the help of
diffusion
how does carbon dioxide leave the body?
by the exhalation from the lungs
the _______ is a common passage for food and air
pharnyx
when alveoli in the lungs enlarge and can’t push oxygen to the blood?
emphysema
cigarette smoke contains
nicotine, tar, carbon monoxide and irritants
tar increases the risk of
lung cancer
