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 Your Child to Be Bold for the Gospel - Your Daily Prayer - May 22
My prayer today is that we will not hinder children from knowing the Lord. Instead, let us pray that their boldness will arise. But let us also remember we cannot pray for our children to be bold in their faith if we aren’t bold enough to teach them!
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