microscopic blood vessel that connects arteries and veins
simple innate behavior that is an automatic response and does not involve a message to the brain
process by which organisms exchange nutrient and waste gases
Striated, involuntary muscle found only in the heart.
tiny, thin-walled, grapelike clusters at the end of each bronchiole that are surrounded by capillaries
muscle that can be consciously controlled.
A group of organs that work together to perform one or more functions.
two lower chambers of the heart
a thin layer of tissue that forms a boundary between the body of a human or animal and the outside world
the process of sweating as a response to heat in order to cool the body
These electrical currents excite or inhibit activity in other neurons or in the tissues of the body, such as muscles and glands.
the system of nerve cells and fibers that transmit information in the form of nerve impulses between all parts of the body
a structure, such as the heart, made up of different types of tissues that all work together.
System that forms an internal, living framework that provides shape and support
voluntary, striated muscle that moves bones, works in pairs, and is attached to bones by tendons.
tubelike passageway for food, liquid, and air.
air-conducting tube that connects the larynx with the bronchi
airway to which the vocal cords are attached.
any place where two or more bones come together