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The large vessels that return blood to the heart are called  

Blood pressure increases with all of the following EXCEPT increased  

A sample of John’s blood shows a high level of pyrogens. This would indicate that John

Infection with the HIV virus occurs through  

The coronary sulcus is a groove that  

 Stem cells that will form B cells or NK cells are found only in the  

T cells and B cells that destroy only one antigen without affecting other antigens or normal tissues, this is termed  

In a(n) ________, either the immune system fails to develop normally or the immune response is does not function to protect the person.  

The atrioventricular valves permit blood flow  

Immunity that results from antibodies that pass through the placenta from mother to fetus is called ________ immunity.