Definition of Blood: Blood is a fluid connective tissue that consists of plasma, blood cells and platelets. It circulates throughout our body delivering oxygen and nutrients to various cells and tissues. It makes up 8% of our body weight. An average adult possesses around 5-6 liters of blood.
The maintenance of a relatively constant volume and a stable composition of the body fluids is essential for homeostasis. Some of the most common and important problems in clinical medicine arise because of abnormalities in the control systems that maintain this constancy of the body fluids.
Physiology definition: is the scientific study of functions and mechanisms in living systems. It is a branch of biology that focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out chemical and physical functions in living organisms. Scope: Physiology examines life processes at various levels, from molecular and cellular to organ systems and whole organisms. It seeks to understand how different parts of living things work together to maintain life.