Swaras are 7; they are Shadjam, Rishabham, Gandharam, Madhyamam, Panchamam, Dhaivatam & Nishadam, even shortened as Sa, Ri, Ga, Ma, Pa, Da, Ni or S, R, G, M, P, D, N
Each swara has its own significance/specialities. Some of them are originated from animal sounds. Some are related to god. The below table explains you more.
Swaram Fullform Meaning Animal God
Sa Shadjam Ocean Peacock Ganesha
Re Rishabham Bull Bull/skylark Agni
Ga Gandharam Sky Goat Shiva
Ma Madhyamam Middle Dove Vishnu
Pa Panchamam Fifth Cuckoo Naarada
Dha Dhaivatam Dharti Horse Sadasiva
Ni Nishadam Hunter Elephant Surya
