Pulmonary sarcoidosis is a lung disease characterized by granulomas—tiny clumps of immune cells that form in response to ...

The gas exchange system is made from key parts, each of which has a different function. Bronchus The trachea splits into a left and right bronchus (plural: bronchi), each leads to a lung.

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 ...

Pulmonary sarcoidosis is a lung disease characterized ... of the lymphatic system -- the circulatory system through which immune cells travel -- not immune function. But the researchers found ...