Breathing apparatus for medical purposes; Heart rate monitoring apparatus; Heart rate monitors; LED masks for therapeutic purposes; Respirators for artificial respiration; Respirators for filtering air for medical purposes; Respiratory monitors for sports activities; Wound drainage apparatus; Wound suction apparatus; Medical apparatus, namely, respiratory equipment and monitors therefor; Medical devices for closing wounds; Patient breathing system comprising a breathing circuit, connections to patient, ventilator, scavenger, fresh gas delivery circuit and carbon dioxide absorber; Pediatric breathing masks for medical purposes; Portable medical devices used for breathing exercises, namely, portable devices used for endogenous breathing exercises and for respiratory muscle training