ultrasound (Science: investigation) A type of imaging technique which uses high-frequency sound waves. This is highly operator-dependent and is thought to be useful in diagnosis but not particularly accurate in the assessment of tumour response. For the latter, CT or MR imaging are more accurate...
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
