This is a laboratory-based practical. Look for the content.

Blood is one of the most important components of life. Almost any animal that possesses a circulatory system has blood. From an evolutionary perspective, blood was speculated to have risen from a type of cell that was responsible for phagocytosis and nutrition. Billions of years later, blood and the circulatory system have drastically helped the evolution of more complex life forms.

It is essential to understand how blood is important to the human body, its nature and components and functions.