Biology

With the evolutionary complexity of multicellular organisms and the functional specialization of cells, the need arose for regulation and coordination...

The term “protozoan” is derived from the Greek words “protos”, meaning “first”, and “zoon”, meaning “animal”. This is the name of the kingdom of the simplest living things...

Spinal cord (medulla spinalis) It is a flattened cylindrical cord 42–45 cm long, 1 cm in diameter, weighing 34–38 g. It is located...

Sivakova Elena Vladimirovna primary school teacher MBOU Elninskaya secondary school No. 1 named after M.I. Glinka. Abstract “Respiratory system” Plan...

Higher nervous activity is a system that allows the human and animal body to adapt to variable environmental conditions. Evolutionary...

Material taken from the website www.hystology.ru The cytoplasm of a cell consists of a microscopically structureless basic substance - hyaloplasm, in which...

Cells are divided into prokaryotic and eukaryotic. The first are algae and bacteria, which contain genetic information in one single...

Cells, like the bricks of a house, are the building material of almost all living organisms. What parts do they consist of? What function in...

CNS - what is it? The structure of the human nervous system is described as an extensive electrical network. Perhaps this is the most accurate metaphor from...

We invite you to familiarize yourself with the materials and. : cellulose membrane, membrane, cytoplasm with organelles, nucleus, vacuoles with cell sap. Presence...

Conditioned reflexes are reactions of the whole organism or any part of it to external or internal stimuli. They manifest themselves through disappearance...

Swallowing, salivation, rapid breathing due to lack of oxygen - all these are reflexes. There are a huge variety of them. Moreover, everyone...