Mitosis is the process by which cells divide and replicate themselves. It is how organisms (like humans) grow. During mitosis one cell (the parent cell) splits into two daughter cells which are identical copies of the parent cell. They are identical because the genetic information (or DNA) in the parent cell's nucleus is replicated (copied) before the cell divides.see more
Respiration is the process by which people (and other organisms) break down glucose (from sugars and charbohydrates in their food) in order to release energy. This process requires oxygen which we breath in.
Respiration occurs in almost every cell in the body because the whole body needs energy.
The energy is released in the form of a molecule called ATP which is easily broken down to provide energy when needed.
This energy can then be used for movement (muscle contractions) and other uses in the body, like making and transporting molecules.
Water and carbon dioxide (which we breath out) are also produced during respiration.
So, the chemical equation for resperation is:
glucose + oxygen --> water + carbon dioxide (+ energy)see more
Veins take blood towards the heart from the rest of the body. This is usualy deoxygenated blood because the oxygen has been taken up by respiring cells in the body. However, the pulmonary vein takes oxygenated blood from the lungs to the heart ready to be pumped around the body.
Arteries take blood away from the heart to the rest of the body. This is usually oxygenated blood which is pumped around the body to provide the cells with oxygen. However the pulmonary artery takes deoxygenated blood from the heart to the lungs where the blood can become oxygenated.see more