simple and complex tissue

deals with difference

1. Topic Structure of simple and complex tissues Relation

2. Complex and Simple Tissues SIMPLE TISSUES: A simple tissue is made up of similar type of cells which have common origin and function. TYPES: T here are 3 types of tissues. 1.Parenchyma 2.Collenchyma 3.Sclerenchyma

3. 1.PARENCHYMA It is composed of living cells which are variable in their morphology and physiology. OCCURANCE: It occurs in pith, mesophyll of leaf, endosperm of seed , pulp of fruit.

4. STRUCTURE It consists of unspecialized cells with thin cell wall. These are living with large central vacuole. Have intercellular spaces between them. They are oval , rounded, polygonal in shapes.

5. FUNCTIONS It provides support to plants and also stores food in the form of starch grains , fats and oils. Air spaces in parenchyma also facilitates exchange of gases.

6. 2. COLLENCHYMA They are elongated living cells with small intercellular spaces. Their cell walls are made of cellulose and pectin. It occurs in peripheral regions of stems and leaves. It allows easy bending in various parts of a plant, without breaking. Mature collenchyma are living and contain protoplast.

7. TYPES: There are three types of collenchyma tissues on the basis of cell enlargement . 1.Angular 2.Lamellar 3.Tubular