Organisation & The Vascular Structures - Terms and Definitions

Term	Definition
Meristem	A region of mitosis in a plant
Portal Blood System	One that begins and ends in capillaries
Artery	Blood vessel that carries blood away from the heart
Vein	Blood vessel that carries blood towards the heart
Capillary	Blood vessel that links an arteriole to a venule
Closed circulatory system	When blood remains within blood vessels as it travels around the body
Open circulatory system	When blood does not remain within (leaves) blood vessels as it travels around the body