Pink blood cells consist of haemoglobin, and a single molecule of haemoglobin can carry up to four molecules of oxygen. A lot of the haemoglobin in blood brings together with oxygen since it passes throughout the lungs.I like you quite much → أَنا مُعْجَبٌ بِكَ كَثيراً → Moc se mi líbíš → Jeg kan rigtig godt lide dig