The chamber of the heart that pumps the blood into the blood vessels that carry it away from the heart. The lower chamber of the heart through which blood leaves the heart. Small veins that connect a vein with capillaries. Large diameter cells of the xylem that are extremely specialized and efficient at conduction. An evolutionary advance over tracheids.
Most angiosperms have vessels.
Projections of the inner layer of the small intestine that increase the surface area for absorbtion of food. Naked RNA, possibly of degenerated virus, that infects plants. A collective term for the external genitals in women.