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Why is the human circulation em called a double circulation system?

In the double circulation system there are two routes that the blood can take: 1. Through the lungs 2. To the rest of the body The blood starting in the heart has no oxygen in it. It flows from the heart and...
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Answered by Elizabeth L. • Biology tutor
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What is the difference between osmosis and active transport?

First of all we have to understand that there are concentration gradients between cells and the outside. A higher concentration of solute is when there is more solute (eg salt) dissolved in the solvent (e.g ...
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Answered by Elizabeth L. • Biology tutor
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What happens to the blood when it enters the heart?

The heart has four chambers; the right ventricle and atrium, and the left ventricle and atrium. Deoxygenated blood, once it has travelled the entire body, enters the heart from the vena cava into the right a...
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Answered by Giulia Z. • Biology tutor
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What are the levels of protein structure?

The structure of proteins, especially those of enzymes, is extremely important in allowing them to carry out their duties in the cell and body. Protein folding needs to be specific, and repeated exactly the ...
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Answered by Giulia Z. • Biology tutor
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What is Mitosis?

During mitosis , one cell divides into two daughter cells. First, the cell grows and doubles the amount of DNA (in human cells from 23 pairs of chromosomes to 46 pairs of chromosomes). During the different s...
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Answered by Simone V. • Biology tutor
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