You've got the midrib, and the veins, and the edge, and the leaf stem, which is called the petiole. Different plants from different parts of the world have different adaptations to help them ...

The cells that make up the walls of the finest of all lymphatic vessels have a lobate, oak leaf-like shape that makes them ...

The cells that make up the walls of the finest of all lymphatic vessels have a lobate, oak leaf-like shape that makes them particularly resilient to ...