Type A blood can safely donate RBCs to ____ and can receive RBCs of type _____.

Most strokes and heart attacks are caused by the abnormal clotting of blood in an unbroken vessel. Moreover, a piece of the ______(clot) may break loose and begin to travel in the bloodstream as a(n) ________.

Each hemoglobin molecule can transport up to ____ oxygen molecules.

The muscle tone of the ____ along the colon contracts it lengthwise, causing its walls to bulge and form pouches called___.

Autoimmune diseases are disorders in which the immune system fails to distinguish ___ from foreign antigens

ID structure within the triangle

ID the blood cell at the blue star

By volume, most of the semen is produced in the

Identify the structure at #15

ID the part shaded orange