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Structural Organisation in Animals
Flash cards
Page 2


Structural Organisation in Animals
Flash cards
A group of similar cells along with intercellular
substances perform a specific function is called t i s s u e.
Page 3


Structural Organisation in Animals
Flash cards
A group of similar cells along with intercellular
substances perform a specific function is called t i s s u e.
The structure of the cells vary according to their function.
Therefore, the tissues are different and are broadly
classified into four types-
E p i t h e l i a l 1.
C o n n e c t i v e 2.
M u s c u l a r 3.
N e u r a l 4.
Page 4


Structural Organisation in Animals
Flash cards
A group of similar cells along with intercellular
substances perform a specific function is called t i s s u e.
The structure of the cells vary according to their function.
Therefore, the tissues are different and are broadly
classified into four types-
E p i t h e l i a l 1.
C o n n e c t i v e 2.
M u s c u l a r 3.
N e u r a l 4.
Squamous epithelium is found in wall of blood vessels and  
air sacs of lungs.
Cuboidal epithelium is found in ducts of glands and tubular  
part of nephrons.
columnar epithelium lines the inner surface of stomach
and intestine.
Page 5


Structural Organisation in Animals
Flash cards
A group of similar cells along with intercellular
substances perform a specific function is called t i s s u e.
The structure of the cells vary according to their function.
Therefore, the tissues are different and are broadly
classified into four types-
E p i t h e l i a l 1.
C o n n e c t i v e 2.
M u s c u l a r 3.
N e u r a l 4.
Squamous epithelium is found in wall of blood vessels and  
air sacs of lungs.
Cuboidal epithelium is found in ducts of glands and tubular  
part of nephrons.
columnar epithelium lines the inner surface of stomach
and intestine.
The columnar or cuboidal cells bearing cilia on their surface  
are called ciliated epithelium and are present in inner  
surface of hollow organs like bronchioles and fallopian  
tubes.
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FAQs on Flashcards: Structural Organisation in Animals - Biology Class 11 - NEET

1. What is the importance of structural organization in animals?
Ans. Structural organization is crucial in animals as it determines the overall body plan and functionality. It helps in the division of labor among different organs and systems, allowing for specialized functions. Moreover, structural organization ensures efficient communication and coordination among various body parts, enabling animals to carry out essential activities like locomotion, digestion, respiration, and reproduction.
2. How are animals structurally organized?
Ans. Animals have a hierarchical structural organization. At the cellular level, cells are organized into tissues, which further combine to form organs. Organs work together to form organ systems, and these systems collectively make up the entire organism. This organization allows for the specialized functioning of different tissues, organs, and systems, contributing to the overall survival and well-being of the animal.
3. What are the four levels of structural organization in animals?
Ans. The four levels of structural organization in animals are: 1. Cells: Cells are the basic structural and functional units of living organisms. They are the building blocks of tissues and perform specific functions. 2. Tissues: Tissues are groups of similar cells that work together to perform a particular function. There are four primary types of animal tissues: epithelial, connective, muscular, and nervous tissue. 3. Organs: Organs are composed of different tissues and have specific functions. They are formed by the combination of tissues that work together to carry out a particular task. 4. Organ systems: Organ systems are groups of organs that work together to perform a specific set of functions. Examples of organ systems in animals include the digestive system, respiratory system, circulatory system, and nervous system.
4. How does structural organization differ in different animal species?
Ans. Structural organization can vary among different animal species based on their evolutionary adaptations and ecological needs. While the basic hierarchical organization of cells, tissues, organs, and organ systems remains the same, the specific structures and their arrangements may differ. For example, animals adapted for flight, like birds, have specialized structural modifications in their skeletal system and respiratory system to support aerial locomotion. Similarly, aquatic animals exhibit unique structural adaptations, such as streamlined bodies and gills for efficient swimming and respiration in water.
5. How does structural organization contribute to animal diversity?
Ans. The structural organization plays a significant role in the vast diversity of animal species. It allows for the development of various body plans, sizes, and shapes, which are essential for adaptation to different environments and lifestyles. The diverse structural features enable animals to inhabit diverse habitats, obtain food through different feeding mechanisms, exhibit various modes of locomotion, and possess specialized sensory organs. The structural organization is closely linked to the ecological niche and evolutionary history of each animal species, contributing to the incredible diversity observed in the animal kingdom.
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