Answer:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function,
reproduction, sleep, and mood, among other things.
Explanation:
<em><u>valves:</u></em><em><u /></em><u /> veins have valves arteries do not have...
<em><u>lumen:</u></em><em><u /></em><u /> in arteries it is small while in veins it is large...
<em><u>walls:</u></em><em><u /></em><u /> in arteries walls are thick ..in veins walls are thin...
<em><u>blood:</u></em><em><u /></em><u /> veins have deoxygenated blood (except pulmonary vein) .. while arteries have oxygenated blood...(except pulmonary artery)...
Answer:
Sty I have not learned this yet hopefully i will next year
Answer:
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Answer:
The reservoir?
Explanation:
I hope this is the answer, it should be