biology

He Circulatory system of birds Is composed of the heart (four cavities, similar to mammals), arteries and veins that carry...

The Primary eyebrow function Is to protect the eyes from sweat, rain and even sunlight. Its arched shape allows to...

He Excretory system of birds Is composed of kidneys, ureters and cloaca. All three are responsible for eliminating waste from...

The Alternation of generations Consists of the succession of two different generations of the same species. That is, plants alternate...

The Panda bears are in danger of extinction Because its natural habitat has been largely destroyed by humans for housing...

He Respiratory system of birds Is in charge of oxygenate the tissues and organs and of expelling the carbon dioxide...

He digestive system Of birds Begins at the peak or mouth and includes different important organs and endings such as...

The plasmatic membrane, Cell membrane or cytoplasmic membrane, is a biological membrane that separates the interior of all cells from...

The Autosomal chromosomes Are all chromosomes that have no sexual characteristics. In humans, they go from chromosome 1 to chromosome...

The Circulation in poriferous Or sponges is a peculiar process, since these living beings do not have a circulatory system...

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