Define human biology.

Hint: Human biology is the scientific study of human species. It focuses on how we came on earth, how the human being functions and how we respond to the surroundings. It is closely related to medicine, primate biology and many other fields.

Complete Answer:
Human Biology is an interdisciplinary area. It tests humans through influence. It is a combination of many fields like genetics, anatomy, anthropology, ecology, nutrition, population genetics, etc. Raymond Pearl coined the term human biology.

- Human body is made up of 100 trillion cells. It is a multicellular eukaryotic organism. It is made up of similar and dissimilar cells which carry the specific function. The group of cells performing a particular function is called a tissue. Human body is made up of various tissues which work collectively to form organs and then organism.
- Humans differ from other organisms by the presence of a superior brain. The brain of the present Homo sapiens has evolved and adapted through generation.
- The organs present in the human body carry out several physiological functions like heart for blood circulation, lungs for respiration, kidney for excretion etc. All these are regulated and controlled by the brain and spinal cord. Humans have a hormonal system which controls the physiological processes of our body.

Note: The branch of human biology helps to know the human body functions. It helps the researchers develop effective medicine so that we can stay healthy. New ways of like, effective diets can be chalked out through the help of this study.