NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals are provided in the article below. It covers all the important definitions, concepts, and methodologies that will be really beneficial for the students appearing for CBSE Class 11 Exam 2022-23. The important topics that are included in this chapter are:
- Structural organisation in Earthworm
- Structure organisation in Cockroach
- Structure organisation in Frogs
- Unicellular organisms
- Multicellular creatures
Expected no. of Questions: 1-2 questions of around 3 marks.
Download PDF: NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals
NCERT Solutions for Class 11 Biology Chapter 7
Class 11 Biology Chapter 7 Structural Organisation in Animals: Important Topics
The structural organisation in animals or in any other living things is all same at the fundamental level, which means, all life living on earth is made up of cells. And when cells get together, they form tissues, which in turn, form organs and organ systems. So, the structural organisation in animals begins with the smallest fundamental unit – the cell. And a group of cells that perform a similar function forms tissues. When tissues group together to perform specific functions, they form organs.
| Cells → Tissues → Organs → Organ systems |
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Unicellular Organisms
Single cells are known as unicellular organisms. All the life processes including digestion, excretion, and respiration in a unicellular organism, occur within a single cell. These cannot be seen by naked eyes and are therefore called microorganisms. Some of the examples of unicellular organisms such as bacteria, protozoa, algae, fungi, etc.
| There are two types of unicellular organisms:
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Multicellular Organisms
In multicellular animals, a group of similar cells along with intercellular substances perform a specific function. Such an organization is called tissue. These tissues are organized in specific proportions and patterns to form an organ like the stomach, lung, heart, and kidney for the designed structure of a human body or any complex life form.
| Following are the examples of multicellular organisms:
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