Alveoli are structures in the respiratory system that allow gas exchange with the circulatory system which type of blood vessel would be most effective in this function?
Veins, because they contain only a tunica externa
O Arteries, because they contain only a tunica externa
O Arterioles, because they contain only a tunica intima
O Capillaries, because they contain only a tunica intima

but there is no

i guess you forgot putting it.

answer/// to address the needs of adults with mental illness and increase their ability to function;

ans.

in united states (us), the first leading cause of death for both women and men is heart diseases that leads to more than half of the deaths. heart diseases develop due to narrow arteries, buildup of plaque in blood capillaries that arises difficulties in blood flow.

the second leading cause of deaths in us is cancer that affects individuals of all ages. it develops due to uncontrolled growth and spread of tumor cells, which results in death if the not controlled or treated.

the third leading cause of deaths in us is copd or chronic obstructive pulmonary disease. it includes difficulty in breathing, chest infections, and persistent cough. smocking is a leading cause of copd and around 80% of copd deaths occur due to smoking.

thus, the correct answer is 'option). cancer, copd, and heart disease.'