Dear Student,
A plant mainly consists of two systems :
Shoot system : The shoot system is found above the soil surface. It includes stems, leaves, flowers and fruits.
Root system : The root system is found below the soil surface. It includes roots.
Root system is of two types:
Tap root system: As seen in raddish; here there is a stable main roots from which small roots arise.
Fibrous root system: As seen in grasses; here the main root is not stable and is replaced by many roots forming a cluster of roots.
Regards,