Tissues form an intermediate organisational structure between cells and the organ systems. Different groups of tissues with diverse functions group together to form an organ. In animals, therefore, a group of muscle cells combine together to form muscle tissue.
The classification of tissues in animals falls under four major categories. These are:
Before you learn more about what is the function of tissue, here’s a quiz for you to try:
The study of tissues is known as ________.
In connective tissue, a group of cells separated by a non-living extracellular matrix combine to form a tissue. Connective tissues help provide mechanical strength, shape and rigidity to the organs and keep them in place. Examples of connective tissues include tendons, ligaments, bones, blood, adipose and areolar tissues. Further, there are three types of connective tissues. These are:
Skeletal Connective Tissue.
Fluid Connective Tissue.
Fibrous Connective Tissue.
Connective tissues have several different functions in the human body, namely:
They provide insulation and protection against cold to the body.
They help bind the organs together and provide mechanical support to them.
Connective tissues help transport gases, water, hormones, nutrients and waste materials within the body.
Muscle tissues help us to perform different actions and engage in activities like walking, running and locomotion. There are three types of muscle tissue:
Visceral or smooth muscles that line the inner walls of organs.
Firstly, muscle tissues help us to maintain our posture. Secondly, they also aid in our involuntary and voluntary movements. For example, cardiac muscles help pump blood and regulate its flow in arteries and capillaries.
Nervous tissues are present in the central nervous system that comprises the brain and spinal cord. In the peripheral nervous system, nervous tissues make up the cranial and spinal nerves.
Nervous tissues perform several vital functions, such as:
They control and coordinate metabolic activities in the body.
They help transmit information within the body.
They help maintain stability and create an acute awareness of the environment around us.
They also help us respond to external stimuli.
Epithelial tissues consist of cells that form the external covering of the body. These covers the organ surfaces such as the skin, the airways, the inner walls of our digestive tract as well as the reproductive tract.
Epithelial tissues provide support and mechanical strength to the cells and tissues. They also help in the transportation of materials through diffusion, secretion and filtration.
Moreover, epithelial tissues such as the ones beneath our skin help us in sensory reception and protect us against pathogens and physical trauma. They also secrete hormones, mucus and enzymes from various endocrine organs.
Now that you have gone through the classification of tissues, it’s time to revise a few concepts with the following exercise.
What are the types of tissues?
All of the above.
Here is a classification of tissues chart to help you understand better.
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1. How many Types of Tissues are There?
Ans. There are four types of tissues in animals. These are the connective tissues, the muscle tissues, the nervous tissues and the epithelial tissues.
2. What is the Definition of Tissue?
Ans. A group of cells that play a similar role is called a tissue. In higher multicellular organisms such as human beings, cells cluster together to form groups that perform a definite function. Each group has a specific purpose and is known as a tissue.
3. Write Down two Functions of Connective Tissues.
Ans. Connective tissues help provide mechanical strength, shape and rigidity to the organs and keep them in place. They provide insulation and protection against cold to the body.