<span>the alleles that control which blood group antigens appear on the suface of red blood cells are codominant.</span>
Answer:
thats weird contact your teacher if you have anymore issues:)
Explanation:
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Answer:
They find and destroy invading bacteria. Phagocytes are like the guardian cells of our immune system.
Unoxygenated blood from veins enters the right atrium then it goes down to the right ventricle then out through the pulmonary artery to the lungs where it becomes oxygenated blood which then enters the heart through the pulmonary veins and it goes to the left atrium and then is pumped down to the left ventricle and out through the aorta to the arteries where it travels to different organs and becomes deoxygenated and then the cycle repeats itself.
