True or False: It takes a long time for the body’s defense system to kick in after a leukocyte detects a problem.

When the body senses or finds a foreign substances (called antigens), the immune system works to recognize the antigens. so sometimes they attack instantly or it takes them some time to realize if its a virus or not.

Explanation: Hope this helps {>^o^<}

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.