Structural Organisation In Animals I Neet Crash Course Biology

In this videos we are going to Structural Organisation In Animals - Neet Crash Course Biology

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Structural Organisation in Animals

The structural organization in animals refers to the hierarchical arrangement of cells, tissues, organs, and organ systems that work together to perform life functions. It follows a systematic level of organization, ensuring proper functioning of the body.


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Levels of Structural Organization in Animals

1. Cellular Level

The cell is the basic structural and functional unit of life.

Example: Sponges (Porifera) exhibit a cellular level of organization, where cells perform specific functions but do not form tissues.



2. Tissue Level

Similar cells performing a common function form tissues.

Example: Cnidarians (Hydra, Jellyfish) show a tissue-level organization, where groups of cells coordinate to perform functions like digestion and movement.



3. Organ Level

Different tissues combine to form organs that perform specific functions.

Example: Platyhelminthes (Flatworms) exhibit organ-level organization, where organs like the digestive system function independently.



4. Organ System Level

Organs work together to form organ systems, ensuring efficient body function.

Example: Annelids, Arthropods, Mollusks, and Vertebrates have well-developed organ systems such as the circulatory, nervous, and excretory systems.





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Tissues in Animals

Tissues are classified into four major types:

1. Epithelial Tissue (Covering and Protection)

Lines body surfaces, organs, and cavities.

Example: Skin, lining of the digestive tract.



2. Connective Tissue (Support and Binding)

Provides structural support and connects body parts.

Example: Bone, blood, cartilage, tendons, and ligaments.



3. Muscular Tissue (Movement)

Responsible for movement and locomotion.

Types:

Skeletal Muscle (voluntary)

Smooth Muscle (involuntary)

Cardiac Muscle (heart)




4. Nervous Tissue (Control and Coordination)

Made of neurons, responsible for transmitting signals.

Example: Brain, spinal cord, and nerves.


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