The basic unit of structure and function in a living thing.
The outside boundary of the cell
The control center 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.
A group of similar cells that perform the same function.
A body tissue thta contracts or shorten, amking 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 that is composed of different kinds of tissue.
A group of organs that work together to perform a major function.
The process by which an organism's internal environment is kept stable in spite of changes inthe external environment.
The reaction of your body to potentially threatening, challengeing, or distrubing events.
The inner framework made up of all the bones of the body
The 26 small bones tat make up the backbone
A place in the body where two bones come together
A strong connective tissue that hold bones together in moveable joints
A connective tissue that is more flexible than boen and that protects the ends of bones and keeps them from rubbing together
A hard,dense bone tissue that is beaneath 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
A muscle that is not under conscious control
A muscle tha tis under conscious control
A muscle that is attached to the bones of the skeleton and provides the force that moves the bones.
Storng connective tissue that attaches muscle to bone
A muscle that appears banded; also called skeletal muscle
Involuntary muscle found inside many internal organs of the body
Muscle tissue found only in the heart
The outer layer of the skin
A pigment, or colored substance, that gives skin its color
The inner layer of the skin
An opening through wich sweat reaches the surface of the skin
Structure in the dermis of the skin from which a strand of hair grows
A disease in which some cells in the body divide uncontrollably