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 ...

All living things are made of cells which are differentiated to perform different functions. Substances move into or out of the cell and enzymes are catalysts contributing to cell metabolism.

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.

The human body is truly a miraculous thing, as it functions every day in big and small ways to keep us alive. But while you may have heard of the immune system or the cardiovascular system ...

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 ...

Examination of the mucosal immune system as a global organ, rather than as a group of individual components, will identify and characterize relationships between mucosal sites. The term 'common ...

“One of the biggest surprises was finding that the immune system stimulates the production of the hormone glucagon by sending immune cells on a journey across different organs”. Once in the ...

The findings demonstrate that these organoid models are effective systems for designing and evaluating ... they represent early developmental stages of an organ and might not fully capture the ...

"One of the biggest surprises was finding that the immune system stimulates the production of the hormone glucagon by sending immune cells on a journey across different organs." Once in the ...