These models represent molecules that play a role in the immune system
in which two ways do these molecules fight pathogens in the body
A They carry pathogens out of the body,
B. They eat pathogenu that attook the body
O. They recognize specific pathogens in the body
D. They bind to pathogens that enter the body.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.