Ohngren’s line
A theoretical plane passing between the medial canthus of the eye and the angle of the mandible; used as an arbitrary dividing line in classifying localised tumours of the maxillary sinus; tumours above the line invade vital structures early and have a poorer prognosis, whereas those below the line have a more favourable prognosis.
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..
Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..
Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..