“Coloured scanning electron micrograph (SEM) of a resin cast of blood vessels in the pituitary gland. The smallest blood vessels, capillaries, are coiled around and through the gland, while larger blood vessels, such as the arteries on either side, bring blood to the capillaries.
The pituitary gland, an endocrine gland, is at the base of the brain. It has two sections, the posterior (ring-shaped) and anterior (ball-shaped) lobes. The pituitary hormones, secreted directly into the bloodstream through the permeable capillary walls, control a wide range of functions, including kidney and thyroid function. The cast was made by injecting resin into the blood vessels. The surrounding tissues were then chemically digested.”
Over the past few weeks the hedgerows surrounding the farmland and meadows of Essex, UK, have been full of flowering Crataegus monogyna (hawthorn, may, hedgerow thorn). This small deciduous native tree is the traditional hedging plant of this part of Britain with glossy, deeply lobed leaves on spiky branches and flat sprays of scented cream flowers, these are followed by dark red berries in autumn much appreciate by the birds and other wildlife. It is a wind resistant plant and can be used for coastal or exposed gardens.