Difference Between Simple and Complex Tissues

Simple Tissues 

Simple tissues are the ones which are composed of cells that are structurally and functionally similar i.e. they are formed of only one type of cell.

Complex Tissues 

The complex tissues are the ones which consist of more than one type of cells which work together as a unit. The transportation of organic material, water, and minerals up and down the plants is done by the complex tissues. Therefore, they are also known as the Conducting and Vascular tissues. 

What are the types of Simple Tissues ? 

There are three types of Simple tissues as mentioned below - 

  1. Parenchyma

  2. Collenchyma 

  3. Sclerenchyma


Permanent tissues are the ones which ceases the plant growth. These tissues grow from both the primary and the secondary meristematic tissues and have a definite shape and organization, however, they lack the potential to divide themselves too. 


Permanent tissues can be classified into two major types on the basis of constituent cell

  • Simple tissue – parenchyma, collenchyma and sclerenchyma

  • Complex tissue – xylem and phloem


Parenchyma – they are living cells and walled, soft in nature due to the presence of thin-walled cells

Collenchyma – These are characterized by uneven thick-walled living cells. This uneven thickness of the cell walls divides partially hard giving mechanical support derived essentially from the elongated cells of the ground meristems, procambium sometimes.

Sclerenchyma – These cells have thickened lignified walls which provide them strength by making them waterproof.


What are the types of Complex Tissues? 

Complex tissues are of two types as mentioned below - 

  1. Xylem 

  2. Phloem


The primary difference between simple and complex tissue is, simple tissue is made up of only one type of cell whereas complex tissue is formed of many types of cells. A simple tissue in animals is known as Epithelium whereas in plants it is known as Epidermis. Complex tissues are scattered everywhere in the body to hold all the organs together and support them. 

Difference Between Simple And Complex Tissue

Characteristics

Simple tissue

Complex tissue

Type

Homogeneous

Heterogeneous

Distribution

Wide

Restricted

Performance

Many functions

Majorly take part in conduction

Made of

A single type of cell

More than one type of cells

Function

Food storage

To protect

Occur

All parts of a plant

The vascular region of a plant

Provides

Transportation of water and food in plants

Support to plants

Example

Collenchyma, parenchyma

Phloem, Xylem

Functions of Tissues 

Each tissue present in our body performs their specific functions which is generally reflected in the arrangement of the cells and its appearances. The basic function performed by the cells are - 

  • secretion

  • movement

  • strength

  • excretion

  • communication

Tissues and their secretion 

There are different types of tissues which secrete different hormones. Some of which are consumed and some are not. Let's have a look at the tissues and their secretion accordingly as mentioned below - 

Tissues and their secretion 

Tissues 

Secretion 

Breast 

Milk 

Thyroid

Thyroid Hormones 

Tear Ducts 

Tears 

Stomach epithelium

acid, intrinsic factor


FAQ (Frequently Asked Questions)

1. What are Simple Tissues ?

Simple tissues are the ones which are composed of cells that are structurally and functionally similar i.e. they are formed of only one type of cell.

2. What are Complex Tissues?

The complex tissues are the ones which consist of more than one type of cells which work together as a unit. The transportation of organic material, water, and minerals up and down the plants is done by the complex tissues. Therefore, they are also known as the Conducting and Vascular tissues.

3. What are the different types of Permanent Tissues?

Permanent tissues can be classified into two major types on the basis of constituent cell

  • Simple tissue – parenchyma, collenchyma and sclerenchyma

  • Complex tissue – xylem and phloem

Parenchyma – they are living cells and walled, soft in nature due to the presence of thin-walled cells

Collenchyma – These are characterized by uneven thick-walled living cells. This uneven thickness of the cell walls divides partially hard giving mechanical support derived essentially from the elongated cells of the ground meristems, procambium sometimes.

Sclerenchyma – These cells have thickened lignified walls which provide them strength by making them waterproof.

4. What are the functions performed by tissues?

Each tissue present in our body performs their specific functions which is generally reflected in the arrangement of the cells and its appearances. The basic function performed by the cells are - 

  • secretion

  • movement

  • strength

  • excretion

  • communication

5. Name some of the tissues and their secretions

There are different types of tissues which secrete different hormones. Some of which are consumed and some are not. Let's have a look at the tissues and their secretion accordingly - 

  1. Breasts - It secretes Milk which is useful for the growth and development of a child. 

  2. Thyroid - Thyroid secretes thyroid hormones. 

  3. Tear Ducts - It secretes tears 

  4. Stomach epithelium - It secretes acid and some intrinsic factor