Mendeleev organized the chemical elements based on their properties.
Mendeleev put elements in order in the periodic table according to their physical and chemical properties. He noticed that properties of elements were related to their atomic mass in a 'periodic' way, so he groups of elements with similar properties into vertical columns in the table. His periodic table had initial 63 elements which then expanded to 108 or 109 elements.
Answer:
A
Explanation:
Small sacs of fluid called bursae cushion the Achilles tendon at the heel. The Achilles tendon is the largest and strongest tendon in the body. When the calf muscles flex, the Achilles tendon pulls on the heel.
If the pulmonary artery is blocked, blood would go back up to the right ventricle of the heart.
<h3>What is pulmonary artery stenosis? </h3>
The pulmonary artery is responsible for carrying the deoxygenated blood from the right ventricle of the heart to the lungs to get oxygenated.
Pulmonary artery stenosis is a condition in which the pulmonary artery gets narrowed or blocked. Therefore, blood flow from the heart to the lungs is hampered.
This creates pressure on the walls of the heart. Also, if blood flow towards the lungs is hampered, the heart will not receive the required amount of oxygen. All of this will lead to damage to the heart muscles over the course of time.
Therefore, as a result of the pulmonary blockage, blood would first back up into the right ventricle.
Read more about heart valves and vessels, here brainly.com/question/22836711
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Global temperatures will continue to rise
Ocean levels will drop. This negatively affects many coastal areas.
