Winterbottom’s sign
(Science: clinical sign) swelling of the posterior cervical lymph nodes, characteristic of early stages of african trypanosomiasis; useful for surveys or control of migrations from endemic areas of persons with preclinical infections.
Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..