All sciences are a form of systematic knowledge of the physical world that has been gained through observation and experimentation. There are many forms of science: psychology, sociology, astronomy, chemistry, physics, anatomy, etc.
Life sciences are those that deal with organic materials (as opposed to inorganic, which would be non-living). Life sciences are any science that deal with living organisms, their life process or anatomy (structure and function), and/or interrelationships. Examples of life sciences include: biology, anatomy, ecology, medicine, etc.
Biology is the term that literally means "life science". "Bio" mean "life" and "ology" means "the study of". Therefore, biology literally means the study of life. Topics that are studied in biology include: cells, reproduction, taxonomy (classification of organisms), ecology, and anatomy.
The life sciences comprise the fields of science that involve the scientific study of living organisms such as microorganisms, plants, animals, and human beings as well as related considerations like bioethics. While biology remains the centerpiece of the life sciences, technological advances in molecular biology and biotechnology have led to a burgeoning of specializations and interdisciplinary fields