Unit 3: Session 7: Body Organization/ Hierarchy

What is the basic sequence of biological organization from smallest to largest in the human body?

Cells form tissues, tissues form organs, organs form organ systems, and organ systems form the body.

What is the term for the structural organization of the body in levels from simple to complex?

A hierarchy.

What does cell theory state about living things?

All living things, including humans, are made of cells.

What are tissues?

Groups of cells associated together to perform a single function.

What is connective tissue and what are some examples?

Tissue that supports and binds structures; examples include tendons and ligaments.

What is epithelial tissue?

Tissue that covers and lines surfaces throughout the body.

What is the function of organs?

Organs are groups of tissues working together to accomplish a single function.

Give one function each for the heart, lungs, liver, and intestines.

Heart pumps blood; lungs allow gas exchange; liver performs biochemical processing; intestines digest food.

What defines an organ system?

A group of organs working together to perform a complete, larger function.

What are examples of major human organ systems and their roles?

Digestive (nutrient absorption), excretory (waste removal), circulatory (transport), nervous (control), respiratory (gas exchange).