Find Your Free Essay Examples

These cells combine to form tissues, which further unite to form organs and organ systems.

All living organisms are made up of tiny building blocks called cells, which are the smallest units of life. These cells combine to form tissues, which further unite to form organs and organ systems. So, what is a tissue in science? All biotic organisms in the world are classified into two major categories: unicellular and multicellular organisms. In higher multicellular organisms such as dogs and human beings, cells cluster together to form groups that perform a particular function. Each group performs a specific function and is known as a tissue. To put it simply, a tissue is a group of cells that play a similar role. These are present in both plants and animals and represent levels of organisation in living organisms. The study of tissues is called histology, and for plants, the subject is called plant anatomy. Read on to know more about tissue and its types.

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:

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:

Connective tissues have several different functions in the human body, namely:

Muscle tissues help us to perform different actions and engage in activities like walking, running and locomotion. There are three types of muscle tissue:

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:

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.

Here is a classification of tissues chart to help you understand better. (image will be uploaded soon)    

Ans. There are four types of tissues in animals. These are the connective tissues, the muscle tissues, the nervous tissues and the epithelial tissues.

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.

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.

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.