TISSUE

Tissue

• Tissue is a group of similar cells that perform a specific function.
• It is the building block of organs and the body as a whole.
• Tissues can be classified into four main types:
  1. Epithelial tissue
  2. Connective tissue
  3. Muscle tissue
  4. Nervous tissue
• Epithelial tissue is the lining of organs, glands, and body surfaces. It forms a barrier against external factors.
• Connective tissue supports, binds, and protects various organs and tissues. It includes bone, cartilage, and fat tissue.
• Muscle tissue is responsible for movement and contraction. It includes skeletal, smooth, and cardiac muscle.
• Nervous tissue is responsible for transmitting and processing information. It includes neurons and supporting cells.
• The structure of a tissue is determined by the shape, size, and arrangement of its cells and the extracellular matrix.

Epithelial Tissue

• It is a sheet of cells that forms a barrier.
• It is found in organs, glands, and body surfaces.
• It is composed of epithelial cells that are held together by tight junctions.
• Epithelial tissue is classified into two main types:
  1. Simple epithelium
  2. Stratified epithelium
• Simple epithelium is a single layer of epithelial cells.
• Stratified epithelium is multiple layers of epithelial cells.

Connective Tissue

• It is a supportive tissue that provides structure and protection.
• It is found in various organs and tissues.
• It is composed of connective tissue cells and fibers.
• Connective tissue is classified into three main types:
  1. Loose connective tissue
  2. Dense connective tissue
  3. Specialized connective tissue
• Loose connective tissue is found in organs and tissues.
• Dense connective tissue is found in tendons and ligaments.
• Specialized connective tissue includes blood, bone, and cartilage.

Muscle Tissue

• It is a contractile tissue that provides movement and support.
• It is found in skeletal, smooth, and cardiac muscle.
• It is composed of muscle fibers and connective tissue.
• Muscle tissue is classified into three main types:
  1. Skeletal muscle
  2. Smooth muscle
  3. Cardiac muscle
• Skeletal muscle is attached to bones and provides movement.
• Smooth muscle is found in organs and provides support.
• Cardiac muscle is found in the heart and provides contraction.

Nervous Tissue

• It is a sensory and motor tissue that transmits and processes information.
• It is found in the brain, spinal cord, and peripheral nerves.
• It is composed of neurons and supporting cells.
• Nervous tissue is responsible for sensation, movement, and cognition.

Tissue Development

• Tissue development begins during embryonic development.
• It involves the formation of cells, tissues, and organs.
• Tissue development is regulated by genetic and environmental factors.

Tissue Types and Their Functions

• Epithelial tissue: forms a barrier, regulates secretion, and absorbs substances
• Connective tissue: provides support, binds, and protects organs and tissues
• Muscle tissue: provides movement and support
• Nervous tissue: transmits and processes information

Tissue Structure and Function

• The structure of a tissue is determined by the shape, size, and arrangement of its cells and the extracellular matrix.
• The function of a tissue is determined by its composition and organization.

Tissue Repair and Regeneration

• Tissue repair involves the replacement of damaged cells and tissues.
• Tissue regeneration involves the growth of new cells and tissues.
• Tissue repair and regeneration are regulated by genetic and environmental factors.