Answer:
The nervous system is made up of the brain, spinal cord and nerves. It is the body's communication system that controls much of what your body does. It allows you to do things like walk, speak, swallow, breathe and learn, and controls how your body reacts in an emergency.
Explanation:
Gel electrophoresis. Gel electrophoresis creates what is called a "DNA fingerprint" which can be used to identify individual organisms or people. It is used in finding paternity, criminology, and when identifying relationships.
Maintain its metabolism, ensure growth of the body tissues and also repair of new and worn out tissues
The umbilical cord transport food/nutrients to the fetus. I hope this helps
So when one scientist turns around and says the mass of an electron is 9.10938291×10^-31 kilograms we know what a kilogram is and so we don't get an answer that it's 32949 microsmiths as he invented his own measurement because he needed one.