Organization of Cells and Formation of an Organism.
Levels of organization
A tissue is a group of cells performing the same function.
Examples of tissues in plants
|Photosynthetic||Manufactures food for the plant|
|Xylem||Transport of water and mineral salts from the roots to the leaves|
|Phloem||Transports food and substances from the leaves and storage organs to other parts of the plant|
|Epidermal||Covers and protects the plants
Prevents excessive water loss
Examples of tissues in animals
|Blood||Transports materials from one part of the body to another
Protects the body against infection
|Nerve||Transmits nerve impulses|
|Muscle||Produce movement through contraction and relaxation of cells|
Organs and systems
An organ is a collection of tissues specialized in carrying out a specific function.
Examples in plants include: leaves, stems, roots and flowers.
Examples in animals include; heart, brain stomach, liver kidney, limbs etc
A system is a collection of different organs performing a specific function.
Examples in plants include; roots and shoot system.
Examples in animals include; Digestive, circulatory, excretory, nervous, skeletal etc