The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
Have you ever wondered what the human body is made up of? Cells are the fundamental unit of life. All organisms are made of cells. Organisms may be single cell (unicellular) or made up of several cells (multicellular). We are multicellular organisms.
The smallest known cells in the world are Mycoplasmas. Cells are the building blocks of all living things. Cells provide structure to the body and convert nutrients taken from food to energy.
They are complex and serve different functions in the body. Cells are of different shapes and sizes, almost like the bricks of the buildings. Our body has cells of varying shapes and sizes – they are the lowest organisation level in all life forms.
Protoplasm is defined as organic and inorganic substances that make up the cell’s living nucleus, cytoplasm, plastid, and mitochondria. The protoplasm is the living part of a cell that is made up of different cellular organelles. It is a jelly-like, colourless, transparent and viscous living substance present within the cell wall.
However, at the microscopic level, all living organisms are made up of the same fundamental unit – the cell.
The presence of a nucleus is the basic difference between prokaryotic and eukaryotic cells. In prokaryotic cells, the true nucleus is absent, and the membrane-bound organelles are found only in eukaryotic cells. Other main distinctions between prokaryotic and eukaryotic cells are that prokaryotic cells are exclusively unicellular, while eukaryotic cells are not.
In basic terms, tissue can be described as a group of cells with a similar shape and function, called tissues.
Animal tissues are divided into four types:
The classification of plant tissues is primarily based on the following two relevant criteria:
Plant Tissues are generally classified into three tissue systems. This classification is based on the parts of the plants they are present in.
The plant tissue is classified into two groups. This classification is based on the type of cells that they contain.
In this chapter, we developed a basic understanding of the cell. We also learned about the types of plant and animal tissues and the primary difference between them.