What is a tissue
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A tissue is a group of specialized cells that perform a common function. Tissues are the basic building blocks of the body and are classified into four main types: epithelial tissue, connective tissue, muscle tissue, and nervous tissue.
Epithelial tissue covers the body surface and the internal organs, forming a protective barrier against physical damage, infection, and dehydration. It also serves as a selective barrier that regulates the movement of substances in and out of the body.
Connective tissue supports and connects different body parts, providing structure and stability to the body. It also transports nutrients and waste products and participates in the immune response.
Muscle tissue is responsible for body movement, generating heat, and maintaining posture. There are three types of muscle tissue: skeletal muscle, smooth muscle, and cardiac muscle.
Nervous tissue controls and coordinates body functions, transmitting signals between different parts of the body. It also responds to stimuli, allowing us to sense and interact with our environment.
Together, these four types of tissue work together to form organs and organ systems, which carry out specific functions essential for the survival of the organism.
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