Chaurasi Ka Chakkar / चौरासी का चक्कर

Man (human) - The main way to decide the nature of any object by contemplation or logic, hence it has been named human. The mind is the cause of man's bondage and liberation. (Bandha Mokshayo of mind and manushnaam karnam) 
The special features of man are only two - the development of the brain and standing and walking.
The human body is only a means of doing action and action is only for the sake of the world. The human vagina is the karma yoni, the enjoyment of the old karma is the new effort.
Eighty-four lakh vaginal details - Aquatic - 9 lakh, Stavar means tree - plant - 20 lakh, Sarsarya worm means insects - insects - 11 lakh, Bird/Navchara - 10 lakh, Terrestrial / land - 30 lakh and 4 lakh of human race. Total 84 lakhs. 84 lakh yonis are mentioned in Padma Purana. And that 84 lakh species are divided into 6 groups – water bodies (9 lakhs), vegetation (20 lakhs), insects (11 lakhs), birds (10 lakhs), animals (30 lakhs) and humans (4 lakhs).
Every human being is of his three and a half hands, there are 24 fingers in one hand. In this way each human being is equal to his 84 finger length. In the human body also, a series of 84 bones has been told in the spinal cord.