Explanation:
Your heart has 4 chambers. The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles. The left ventricle is the largest and strongest chamber in your heart.
A guess based on evidence from the text.
A circuit is the path that an electric current travels on, and a simple circuit contains three components necessary to have a functioning electric circuit, namely, a source of voltage, a conductive path, and a resistor.
The circulatory and skeletal systems work together in the following way: skeletal system produces cells in the bone marrow while the circulatory system transports cells where they need to go (option A).
<h3>What is skeletal and circulatory system?</h3>
Skeletal system is the system that works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals.
Circulatory system, on the other hand, are parts of an animal body comprising the heart, veins, capillaries and arteries. It circulates blood and lymph through the body.
According to the above description of both systems, the skeletal system produces blood cells in the bone marrow while the circulatory system transports these cells.
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Ozone is present in the stratosphere layer of earth's atmosphere, which is about 6 to 30 miles from the earth's surface.
It is very helpful as it protects the life on earth from the harmful ultraviolet rays that come from the sun.
It is harmful as well because when it is inhaled by humans it can damage the lungs and can cause various problems such as chest pain and respiratory diseases.
The ozone layer is depleted by the CFCs, as the UV rays of the sun breaks down the CFCs into chlorine atoms. These chlorine atoms react with ozone and deplete the ozone layer.