Biology: Tissues Overview

Tissues

• Tissues are groups of similar cells that work together to perform a specific function
• There are four main types of tissue in the human body: epithelial, connective, nervous, and muscle tissue

Epithelial Tissue

• Epithelial tissue forms sheets that cover the body's surfaces or line internal organs and cavities
• It protects the body, absorbs nutrients, filters blood, and secretes hormones
• Examples of epithelial tissue include the skin, lining of the digestive tract, and lining of blood vessels

Connective Tissue

• Connective tissue provides structure and support for the body, cushions organs, and stores nutrients
• Connective tissue is made up of cells that are scattered in a matrix of fibers and ground substance
• Examples of connective tissue include bone, cartilage, blood, and adipose (fat) tissue

Nervous Tissue

• Nervous tissue is composed of specialized cells called neurons that transmit electrical impulses throughout the body
• The nervous system is responsible for communication and control in the body, allowing us to sense, think, and move

Muscle Tissue

• Muscle tissue is responsible for movement.
• It’s made up of cells called muscle fibers that can contract and relax
• Three types of muscle tissue exist: skeletal, smooth, and cardiac.
  • Skeletal muscle is attached to bones and allows for voluntary movement.
  • Smooth muscle controls involuntary movements, such as contractions of the digestive tract.
  • Cardiac muscle is found only in the heart and responsible for pumping blood throughout the body.

This quiz covers the four main types of tissue in the human body: epithelial, connective, nervous, and muscle tissues. Understand the structure and function of each tissue type, including examples and their roles in the body. Test your knowledge on how these tissues contribute to overall bodily functions.