Ayurveda studies the human body as an overall functional unit, rather than as an individual unit. The human body is complex in nature and comprises organs and tissues that work in perfect harmony with each other to ensure health. The Dhatus, which are the different tissues of the body, are responsible for functioning and maintaining the functions of the organs and structure of the body. Ayurveda recognizes the following seven dhatus: Rasa - Sap/FluidChyle.Rakta - Blood.Mamsa - Muscle.Asthi - BoneMajja - Bone marrowMeda - Fat, brain and spinal cordSukra - Sperm and eggThese seven tissues are essential for growth and development of the body. . Each dhatu individually and collectively plays a role in building the body. In Sanskrit, the word dhatu means “to bind together,” and that is exactly what dhatus do: they link different parts and functions of the body to form a cohesive whole. After food is consumed and digested, the digestive system releases food in the form of sap or vital fluid, known as 'Rasa'. Rasa is the main source on which all other dhatus are built. When Rasa enters the bloodstream, it turns into blood or “Rakta”. Rakta is the source of existence. Rakta nourishes every cell and tissue in the body. It is made up of white blood cells, red blood cells, plasma and platelets. Rakta is also responsible for purifying the blood through the gaseous exchange of oxygen and carbon dioxide through the lungs. Rakta dhatu helps develop, build and maintain muscles, known as 'Mamsa'. Mamsa dhatu is attached to the skeleton, facilitates joint movements and gives strength to the body. The bold dhatu or “Meda” is derived from Mamsa. Medha functions as a body heat regulator and is responsible for lubricating muscles. Meda dhatu is distributed all over the body in uneven quantities, defining the shape of the body. It also protects the body from the impact of external injuries. The bones or “Asthi” dhatu are developed from Meda. It is the skeleton made up of bone tissue and cartilage. The Asthi dhatu supports all other dhatus because it functions as the basic structure that contains all the organs. It also defines body shape and size. The Asthi dhatu is responsible for the formation of “Majja”, also known as bone marrow..