1. In the respiratory tract, columnar epithelium has cilia. These hair-like projections move mucus and trapped particles out of the airways, helping to clean the respiratory passages and protect against infection and irritation.

    In the respiratory tract, columnar epithelium has cilia. These hair-like projections move mucus and trapped particles out of the airways, helping to clean the respiratory passages and protect against infection and irritation.

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  2. The primary function of bone as a connective tissue is to provide structural support, protect vital organs, facilitate movement by anchoring muscles, and store essential minerals like calcium and phosphorus.

    The primary function of bone as a connective tissue is to provide structural support, protect vital organs, facilitate movement by anchoring muscles, and store essential minerals like calcium and phosphorus.

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  3. The functions of blood in the body include transporting gases, nutrients, hormones, and waste products, regulating body temperature, maintaining pH balance, and protecting against infections through the immune response.

    The functions of blood in the body include transporting gases, nutrients, hormones, and waste products, regulating body temperature, maintaining pH balance, and protecting against infections through the immune response.

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  4. The main function of epithelial tissues in the animal body is to provide protection, act as a barrier against pathogens, regulate the exchange of substances, and facilitate absorption, secretion, and sensation across various body surfaces and cavities.

    The main function of epithelial tissues in the animal body is to provide protection, act as a barrier against pathogens, regulate the exchange of substances, and facilitate absorption, secretion, and sensation across various body surfaces and cavities.

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  5. The hard matrix in which bone cells are embedded is composed primarily of calcium and phosphorus compounds. These minerals provide strength and rigidity, forming a durable structure that supports and protects the body while anchoring muscles.

    The hard matrix in which bone cells are embedded is composed primarily of calcium and phosphorus compounds. These minerals provide strength and rigidity, forming a durable structure that supports and protects the body while anchoring muscles.

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