What is the function of cilia in the respiratory system? to sweep particles
to bind oxygen
to trigger inhalation
to encourage gas exchange

to sweep particles

Explanation:

Cilia helps to sweep mucus out of the lungs

The right answer is AB-.

In humans, the blood group is determined by the substances on the surface of the red blood cells, called antigens. Blood groups are grouped into systems. In the ABO system, there are four possible blood groups: A, B, O, and AB. In the Rh system, the presence or absence of substance "D" on the surface of the red blood cell determines whether Rh is positive (+) or negative (-).

The combination of the two systems allows classification into 8 blood groups: groups: A +, A-, B +, B-, AB +, AB-, O + and O-.

A Rh- subject can only receive Rh- blood, but a Rh + subject can receive Rh + but also Rh- since the latter does not possess rhesus antigen. therefore if we do not know the rhesus of the subjects we can transfuse Rh-blood without risk (Biensur with ABO compatibility).