Plant Structures and Functions

Structures and Functions Structure-

means a part.Examples: roots,

stems, and leaves.

Function- means a job.

The Root’s Functions 1. Roots absorb water and minerals from the soil like a sponge. 2. Roots hold a plant in place like an

anchor. 3. Roots can store food like a fridge.

Root hairs- threadlike cells that take in water and minerals from soil.

Nutrients- a substance needed for nourishment. Synonym for minerals.

Types of RootsTaproot- A single, thick root.

Fibrous roots- Many same size roots that spread out into the soil.

Carrot Root Dandelion Root

Grass Roots

The fibrous roots in larger treesneed to spread out farther in order to support the tree. Sometimes they even show up above ground.

Watch as the fibrous rootsin this lima bean plant growdeeper and spread furtherinto the soil.

Some roots, like thesebeets, along with carrots and turnipsare edible.

The Stem’s Function The stem carries

water, minerals, and other nutrients to and from the roots and leaves.

The Stem: A 2-Way HighwayWater andnutrients are absorbed by the rootsand travelthrough thestem to theleaves.

Food for the plant ismade in the leaves. It travels through the stem toother partsof the plant. Anyextra food isstored in the roots.

Types of StemsWoody stems provide extra support to larger plants like trees and shrubs.

Soft stems are soft, green, bendable, and found in smaller plants like daisies and strawberries.

Exit Slip- A Real Head-Scratcher

1. What are the 3 functions of the roots?2. What is the main function of the stem?