the basic unit of structure and function in living things
the outside cell boundary that controls which substances can enter or leave the cell
The control center of a eukaryotic cell that directs the cell's activities and contains the information that determines the cell's form and function.
the material within a cell apart from the nucleus
group of similar cells that perform a particular function
A body tissue that contracts or shortens, making body parts move.
A body tissue that carries electrical messages back and forth between the brain and every other part of the body.
a body tissue that provides support for the body and connects all of its parts
a body tissue that covers the surfaces of the body, inside and out
a structure in the body that is composed of different kinds of tissue
group of organs that work together to perform a major function in the body
the maintenance of stable internal conditions in an organism
the reaction of a person's body to potentially threatening, challenging, or disturbing events
the inner framework made up of all the bones of the body
the small bones that make up the backbone
A place in the body where two bones come together
strong connective tissue that holds bones together in movable joints
A connective tissue that is more flexible than bone and that gives support to some parts of the body
Hard, dense bone tissue that is beneath the outer membrane of a bone
Layer of Bone tissue having many small spaces and found just inside the layer of compact bone
the soft connective tissue that fills the internal spaces in bone
a condition in which the body's bones become weak and break easily