A time lapse spanning 9 days shows the growth of radish seeds sprouting while their roots grow deeper into the dirt.

Many plants, such as trees and flowers, have vascular systems. These vascular plants have a system of tubes they use to transport nutrients and water to different parts of the plant. Vascular plants all have similar parts, such as stems, leaves and roots.

The roots, for example, have several important functions. They pull water and minerals from the environment to nourish the plant. This is why they grow down, because the water and minerals needed for growth are below the ground in the soil.

They also provide support and help anchor a plant to the ground. Without a strong root system, trees would not be able to stand tall and withstand high winds.

Roots can also store food and nutrients. A well-developed root system can also prevent soil erosion. Some roots are even edible. For example, the carrots we eat are the roots of the carrot plant!

Not all roots are underground, though. For example, water plants may have roots that float in the water. Epiphytes are plants that live in trees with roots that cling to tree branches.

There are even some plants that don’t have roots at all. Remember: the plant kingdom is huge. It’s hard for the human mind to grasp the number and wide variety of plants that exist on Earth.

from Wonderopolis.