The heart begins its work approximately 21 days after conception. As a single cell pump, it will soon develop into four distinct chambers. It becomes the muscle; all other muscles depend to do their work. Beating on an average day 115,000 times, about 200 gallons of blood is pumped into arteries and veins traveling an unprecedented 12,000 miles a day while overcoming gravity to provide nutrients to every organ, muscle, nerve, and tissue.
It is the force of the hearts contraction that maintains our blood pressure; allowing us to breathe and exchange gases at all levels of respiration, ensuring oxygen is provided to all cells of the body, and waste products are eliminated.
Answer:
involves injecting the body with specific medication
Explanation:
Vaccination is a versatile and effective methodology for preventing diseases caused by exposure to harmful bacterial and viral infectious agents. Literally, vaccination refers to the administration of medical preparations that help the body to produce immunity against infectious diseases. Vaccines are used to prevent outbreaks caused by infectious diseases. Even under optimal conditions, vaccination is not always effective in preventing disease transmission, because the immune system of each organism may react in a different manner to the same vaccination (even to the same dose). However, vaccination is always encouraged to prevent the spread of infectious diseases. Although there are many vaccines that target age groups, there are others that can be applied to different ages.
Answer:
an amino acid group from a molecule
