Class7_Science_Respiration in Organisms_Respiration
The cells in our body perform functions like growth, excretion, reproduction, etc. A cell needs
The cells of living organisms require a constant supply of oxygen to release energy. This is done
by a process called breathing. Breathing involves two steps - one inhalation and one exhalation.
The breath rate of human beings is 15 -- 18 breaths a minute.
Air passes through the tiny hair in the nasal cavity, and then through the pharynx, larynx and windpipe before reaching the lungs. The hairs in the nasal cavity prevent the entry of dust particles and pollen. The mucous lining is present from the nasal cavity to the lungs.
The cells of living organisms require a constant supply of oxygen to release energy. This is done
by a process called breathing. Breathing involves two steps - one inhalation and one exhalation.
The breath rate of human beings is 15 -- 18 breaths a minute.
Air passes through the tiny hair in the nasal cavity, and then through the pharynx, larynx and windpipe before reaching the lungs. The hairs in the nasal cavity prevent the entry of dust particles and pollen. The mucous lining is present from the nasal cavity to the lungs.
Today's Devotional
A Prayer for Zeal When Motivation Is Lacking - Your Daily Prayer - May 26
Even the most seasoned believers find their daily devotion occasionally in a slump. While it’s hard to snap out of dimness on our own, thankfully, God’s Word gives us hope and help today.
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