* Tissues are the building blocks of organs: Think of tissues like different types of bricks. You need different kinds of bricks (muscle, nerve, epithelial, connective) to build different kinds of structures (organs).
* Organs are made of multiple tissue types: A single organ often uses a combination of tissues to function. For example, the stomach uses:
* Muscle tissue to contract and churn food.
* Epithelial tissue to line the stomach and protect it from acid.
* Connective tissue to hold everything together.
* Nervous tissue to control stomach contractions and secretions.
* Shared tissues: Many different organs share the same tissue types. For example, muscle tissue is found in the heart, stomach, and limbs.
So, while organs are composed of tissues, they are not made up of unique, exclusive tissues. They combine different tissues in specific ways to perform their unique functions.
