The changes in metabolic activity associated with endothermy and the change from gill to lung respiration has led to changes in vertebrate circulatory systems. Veins between two capillary networks are ...

Aminoacyl tRNA synthetases picked up new protein domains that participate in vasculature formation around the same time that organisms evolved key adaptations in the circulatory system. Amber Dance is ...

Fish have a circulatory systems with just one circuit. Their hearts pump oxygen poor blood to their gills, where oxygen is absorbed from the water. The blood then flows around the fish's body and ...

Systemic disorders are health conditions affecting one or more of the body’s systems, including but not limited to the respiratory immunological, neurological, circulatory, or digestive systems.

Long COVID is the chronic manifestation of lasting symptoms of SARS-CoV-2 infection that can last for at least 3 months, with shortness of breath and system inefficiency often remaining central issues ...