Answer:
If we do not eat food we will not get energy.
The answer is false.
Monocytes do not secrete antibodies. Monocytes are a type of leukocytes which are made in the bone marrow and travel through the blood to tissues where can be differentiated into macrophages and dendritic cells. Functions of monocytes are:
<span><span>· </span>phagocytosis,
</span> <span><span>· </span>antigen presentation,
</span> <span><span>· </span><span>cytokine production.</span></span>
Answer alveoli and blood vessels
The respiratory bronchioles have single alveoli off their walls. ... The respiratory bronchioles lead into alveolar ducts, (which are surrounded by smooth muscle, elastin and collagen), which lead into the alveolar sacs. These have several alveoli, surrounded by blood vessels - from the pulmonary system.
Explanation:
comment how it helps
Answer:
Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin. Your nervous system controls all these activities with electrical impulses.