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The metabolic activity of any tissue is limited by its blood supply; the more active any organ, the more blood it needs and the more extensive its vascularization. The changes in metabolic activity ...

Using diagrams, the structure of the respiratory system is shown and then the structure ... students to consider how air gets into the body and then oxygen into the blood stream.

Alfred then describes the different parts of the respiratory system to Garry, followed by an explanation of the process of inhalation and exhalation. He describes the role of the diaphragm and ...

An examination of the roles of organ systems in maintaining life and health in mammals, including humans, with emphasis on the alignment between structure and function. Topics include the functions of ...

Both usually produce few young at one time, and ensure their survival by caring for them. Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive ...

Doctors' union the British Medical Association (BMA) and politicians alike have called for an opt-out system to be adopted in England, where people's consent to donate their organs after their ...

Microphysiological systems (MPS) are complex, multi-cellular in vitro systems that commonly include three-dimensional aspects, fluid flow, changing pressure or stretch, and multi-organ interactions.