The finishing asanas are very important. They begin with the Inversion poses like Salamba Sarvangasana, Halasana, Karnapidasana and last until the final pose of the Tolasana. The final asanas calm the breath, balance the mind, and prepare the practitioner for relaxation in Shavasana.
The main task of the Primary series is to open the basin, stretch the spine bone and strengthen the dorsum. The open basin helps to open the chest and the diaphragm, and consequently permits the deep breathing that is essential in Ashtanga Yoga practice.