Why the upper chambers are made thinner?

Is there a vaccine for diphtheria? What is pogomophobia? What is the region of brain concerned with coordination and skeletal muscle called? What age is testicular cancer common? What is an example of synthesis reaction? Most malignant heart tumors originate in cardiac tissue? My daughter just had head lice and used the treatment nitenz the headlice is all gone but all its left is the nasty smell of the treatment and large flakes of dandruff? When did filipos woldeyohannes joined the eritrean arm stugle? Can A yeast infection turn into trichomoniasis? Why would a person need joint replacement? What nutrients do pregnant mothers need? What are interstitial markings in the lungs? Most of the muscles that extend your fingers are located where? Why some children has low hemoglobin? Are you less likely to get chlamydia during your period? What is the process of building up and breaking bones? Are there any strip clubs in Bahrain? What is when lung collapses usually due to injury it is called? What should you do if a vein in your bursts? Can Acute Chemical Pancreatitis such as that brought on post surgery ever lead to Chronic Pancreatitis?