The adaptive immune system is activated if the innate immune system is unable to control the infection. true or false?

relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.