Dhatus

In Ayurveda, dhatus are the seven fundamental tissues that make up the human body, responsible for its overall health and functioning. They are considered the building blocks and sustaining elements of the body. The word “dhatu” is derived from the Sanskrit word Dhātu, meaning “that which holds,” according to Sri Sri Ayurveda Hospital. 

1. [Rasa Dhatu]: Often compared to blood plasma, lymph, or the essence of digested food, it nourishes the cells, tissues, and organs. 
2. [Rakta Dhatu]: Represents blood, specifically the red blood cells, and is associated with carrying oxygen, nutrients, and hormones throughout the body. 
3. [Mamsa Dhatu]: Refers to the muscular tissue, providing strength, movement, and support to the body. 
4. [Meda Dhatu]: Represents fatty tissues, responsible for insulation, organ protection, and lubrication. 
5. [Asthi Dhatu]: Corresponds to bones, providing the structural framework and support for the body. 
6. [Majja Dhatu]: Represents bone marrow, playing a vital role in blood formation, nerve support, and filling the spaces within bones. 
7. [Shukra Dhatu]: Related to reproductive tissue, with different manifestations in males (sperm) and females (eggs). 

These dhatus are interconnected and work together to maintain the body’s health and vitality.

Layers of the skin

The six external layers of skin described are:

1. Epidermis: The outermost protective layer.
2. Blood-containing layer: The second layer, where blood vessels are housed.
3. Features of Grace layer: The third layer responsible for the aesthetic qualities of the skin.
4. Sacs layer: The fourth layer, bearing fluid-storing sacs.
5. Seat of abscesses: The fifth layer, where abscesses and other skin conditions may originate.
6. Life-supporting layer: The sixth and deepest layer, providing support and nourishment for the vitality of the skin. 

Sheaths of the body

The seven sheaths (also referred to as “dhatus” in Ayurvedic contexts) are: 

1. Flesh-supporting: The first sheath supports the flesh and muscles.
2. Blood: The second sheath consists of blood, vital for circulation and nourishment.
3. Liver and Spleen Prop: The third sheath provides support for the liver and spleen.
4. Fat-holding and Bone-supporting: The fourth sheath holds fat and provides support for bones.
5. Marrow, Phlegm, and Feces: The fifth sheath, situated in the abdomen, contains marrow, phlegm, and feces.
6. Bile: The sixth sheath contains bile, involved in digestion and other bodily processes.
7. Semen: The seventh sheath holds semen in the region of the sac. 

These descriptions offer a unique perspective on the body’s structure and functions, highlighting the interconnectedness of various bodily systems and their role in maintaining overall health and vitality, according to Vayu Living. They also underscore the importance of understanding these layers and sheaths in diagnosing and treating various ailments, according to IP Innovative Publication.