Vancomycin

Blocks cross-linking of the peptidoglycan in the cell wall

The antibiotic vancomycin blocks the construction of bacterial cell walls. This structure includes vancomycin (blue) and a short analogue of a bacterial peptidoglycan chain (red). Much of our current arsenal of antibiotics is borrowed from the world's true experts in infection control: bacteria and fungi.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.