Which picture represents an organ?
A group of organs that works together to perform a similar function represents which picture?
Why are cells considered to be the basic unit of structure and function in all organisms?
Which of the following is the LARGEST and MOST complex level of organization in the body?
The liver is a dark red structure in the human body that releases bile and hormones. At what level of organization is the liver?
How does an organ system differ from an organ?
The most basic unit of organization in animals is the
Which sequence BEST describes the levels of organization from simplest to most complex?
The cells in a multicellular organism are specialized to perform a particular function. A group of related cells that work together make up _____.
Justin has learned that the brain, spinal cord, and peripheral nerves work together. What do they combine to form?