PLANT

Function of plants  :

• Primary source of food for people and animals
• Produce oxygen
• Help to keep us cool
• Renew the air
• Provide a home for wildlife
• Beauty surroundings
• Perfume the air
• Furnish buildinh materials and fuel

Part of a plant  :

• Roots
• Shoots

ROOTS

• Not comprised of several organs like the shoot
• Made from many routs which spread out from under to shoot

Function :

• Holds the plant in the ground
• Prevents from being blown away or blown over in a strong wind
• Takes up water and mineral from the soil to help the plant make food and grow

3 Kind of Root System

• Tap Root System {example : carrots, potatoes, radish, parsley}
• Fibrous Root System {example : grass, lemon grass, clover, bamboo, ferns, coconut palm}
• Adventitious Roots {example : corn, orchid, coconut, mangrove tree}

Tap Root System

• has a thick central root
• grows deep into the soil
• has small lateral routs growing from it

Example : carrots, potatoes, radish, parsley

Tap Root Shapes

1. Conical shape, example : carrot 

carrot is an example of conical tap root shape.

   2.   Fusifrom shape, example : radish

radish is an example of fusiform tap root shape.

3.    Napiform shape, example : potato

Potato is an example of napiform tap root shape.

SHOOT

• Grows above the ground
• Comprises several organs
• Stem and its branches
• Major plants of the shoot ; ferminal bud, lateral bud, internode, node

1. Terminal bud - tip of the shoot
2. Lateral bud - sides of the shoot
3. Node : region where the leaf and bud is found
4. Internode : gap between two nodes

LEAVES

• The food factory of the plant
• Produce the food used by the plant or stored for later use

Function  :

• helps to draw water through the plant from the roots
• makes food using the process of photosynthesis

Photosynthesis : process of converting light energy to chemical energy / process by which green plants make use of carbon dioxide and water to manufacture food in the presence of sunlight and chlorophyll.

STEM

Function  : 

• transport water and mineral from roots to the leaf
• movement of water and mineral from the roots upward and movement of manufactured food 
• used for food storage & reproduction of plants involving cuttings
• green stems manufacture food just as leaves do

FLOWERS

• Contains the reproductive parts of the plant
• Differ in shape, size and color