What is the basic structural and functional unit of the human body?

The cell is the fundamental unit, with trillions of specialized cells like bone, muscle, and nerve cells performing specific roles such as support, movement, and communication.

What are the four basic types of tissues in the body?

The four basic tissue types are epithelial tissue for lining and covering surfaces, connective tissue for support and protection, muscle tissue for movement, and nervous tissue for signal transmission.

How are organs defined in terms of tissue composition?

Organs are structures composed of two or more tissue types integrated to perform specific functions, such as the heart for circulation or the stomach for digestion.

What are the major body systems, and how do they function?

There are 11 major body systems, including the skeletal, nervous, and digestive systems. They consist of organs working together to perform coordinated functions like movement, control, and nutrient processing.

What does the organism level represent in human anatomy?

The organism level is the highest level, representing the entire living individual where all organ systems function cooperatively to maintain life.

How do cells, tissues, organs, and systems relate in the body's organization?

They form a hierarchical organization: cells group into tissues, tissues combine into organs, and organs integrate into systems, all working together at the organism level.

Levels of Organization – Cells to Tissues, Organs & Systems