Blood is considered a type of connective tissue because, like other connective tissues, its cells are loosely spaced and embedded in an intercellular matrix. This matrix allows blood to perform its function of connecting different parts of the body by transporting nutrients, gases, and waste products.
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Blood is considered a connective tissue because it originates from mesenchymal cells in the bone marrow, a characteristic of connective tissues. It connects body systems by transporting oxygen, nutrients, hormones, and waste products. Blood consists of cellular components (red cells, white cells, platelets) suspended in plasma, serving roles in transport, defense, and regulation.