How do the circulatory and respiratory systems work together to provide body cells with oxygenated blood? What process produces carbon dioxide? Describe how O2 moves from the atmosphere to the mitochondria in the cells in the body and how it's transported in the blood? Which form is dominant?
In this article, we will take a close look at how your lungs work and how they keep your body's cells supplied with oxygen and get rid of the carbon dioxide waste. We will explain some of the conditions and diseases that make breathing harder and cause the lungs to fail. We will also...
Their influence, however, can be overridden by chemical factors (oxygen, carbon dioxide, pH). Chemical irritants: Nerve cells in the airways sense the presence of unwanted substances in the airways such as pollen, dust, noxious fumes, water, or cigarette smoke. These cells then signal the ...
12. Why do humans get so attached to dogs and cats? 人类为什么会对猫狗如此着迷? 13. Will the world's population keep growing indefinitely? 世界人口会无限增长吗? 14. Why do we stop growing? 我们为什么会停止生长? 15. Is de-extinction possible? 能否复活灭绝生物? 16. Can humans hibernate?
A close-up of blood cells Sebastian Kaulitzki/iStockphoto.com Do you ever wonder what makes up blood? Unless you need to have blood drawn, donate it or have to stop its flow after an injury, you probably don't think much about it. But blood is the most commonly tested part of the...
How is carbon dioxide transported in the blood? Why do red blood cells use glucose as an energy source? Why are red blood cells considered cells? How does not having a nucleus affect red blood cells? Where is pyruvate made in the cell?
COVID-19 is a reminder of their destructive power, but they’re crucial to humans’ development and survival.
Haemoglobin transport oxygen molecule to all the body cells for cellular respiration. The haemoglobin pigment present in the blood gets attached to O2 molecules that are obtained from breathing. It thus forms oxyhaemoglobin and blood becomes oxygenated.
itself. That’s because items that are sent to landfill leach harmful gases into the atmosphere over time, while those burned in an incinerator – even when the residual energy created during the process is harvested – produces exorbitant amounts of carbon dioxide, me...
In order toharness solar energyproduction in a form that can power everyday devices, humanity has come up with photovoltaic cells, commonly known as solar panels. Buthow do solar panels work? They were once used almost exclusively in space, powering satellites' electrical systems as far back as...