Answer:
Vaccines are important in order to prevent infections of more dangerous viruses because with the help of vaccine body makes antibodies which helps in protecting the body against viruses.
Explanation:
There is no medicine present in vaccines. Vaccine contains dead virus which is injected in the body. When the immune system detect these viruses, they make antibodies that are effective in controlling the virus. When these viruses attack again, the body is prepared for it.
The connective tissue layer surrounding bone is called the periosteum. It has an outer fibrous layer and an inner osteogenesic layer.
Answer:
cells are regulated by their oxygen uptake
Oxygen would slowly deplete into carbon dioxide as there is no photosynthesis to create more. Earth would not be able to support human life later on.
That would be skeletal muscle, which is also a voluntary muscle.
