Breathing is the process of moving air into and out of the lungs. The process depends on a muscle called the diaphragm. This is a large, sheet-like muscle below the lungs. Inhaling, or breathing in, occurs when the diaphragm muscle tightens. This increases the size of the chest. This too decreases air pressure inside the lungs. This action allows air and gases to enter the lungs. Exhaling, or breathing out, occurs when the diaphragm muscle relaxes. This decreases the size of the chest. This increases air pressure inside the lungs. This action allows for air to leave the lungs. When you inhale, air enters the respiratory system through your nose and ends up in your lungs, where gas exchange with the blood takes place. What happens to the air along the way? In the nose, mucus and hairs trap any dust or other particles in the air. The air is also warmed and moistened. Next, air passes through a passageway that is connected to the windpipe. The air then finds its way to the lungs. In the chest, the windpipe splits so that air enters both the right and left lung. 

What happens to the air pressure inside the lungs when the diaphragm muscle tightens?


Two women trade houses without ever having met .  They 're both looking for an escape from their problems , but by running away , both come to discover a great deal about themselves .  Ria Lynch is married to Danny Lynch and they have a daughter and a son .  Danny begins spending less and less time at home with his wife and children .  Ria believes another baby is the solution , and is shocked to find out that indeed her husband is going to be a father - but to a child from an affair he has been having .  Her husband's unfaithfulness is the event that leads Ria into her decision to switch homes with a woman from the US called Marilyn who lost her teenage son to a motorcycle accident on his birthday .  Marilyn is struggling to come to terms with her son's death and has become estranged from her husband .  She hopes her time in Dublin will cease her grief .  Ria and Marilyn discover deep , dark secrets about the other during the summer .  The two become close friends but do not reveal the secrets .  { { Expand section } } 

Both women seem to have issues with children, Which woman lost a child and Which wanted to add one to her family?


Juzo Murasaki arrives at a work construction area to take on his new job as a construction worker .  To his quiet dismay , his supervising boss turns out to be Toru Akai , who with his gang had made Juzo's middle school life a living hell .  Akai , however , does n't recognize Juzo .  Juzo's more disconcerted when he discovers that Akai lives with his wife , Nozomi Akai and their toddler son above Juzo's new apartment .  As Juzo emotionally struggles to handle these unexpected developments , a mysterious and seemingly malicious hooded figure appears .  It calls itself Number 13 .  As Juzo attempts to control increasing number of flashbacks and a spiral fall into psychological darkness , Akai constantly picks on Juzo and other work colleagues including Seki Hajime , a former middle school student who becomes Juzo's casual friend in spite of Juzo's anti-social tendencies , at work .  Meanwhile Akai's wife , Nozomi , attempts to make friends with Juzo and entrusting the care of her toddler son to Juzo .  She proudly shows Juzo her husband's school photos .  In one class photo , Juzo's space is marked with an X to show he was absent .  Juzo suffers a severe flashback to explain his absence that day : in their school's science room , Akai and his friends have thrown acid at Juzo's face .  Seki becomes suspicious about Juzo's increasingly odd behavior and goes to inform Arai at the work site , but Arai dismisses him without giving him a chance to speak .  During this incident , Seki does n't realize he's being watched by Number 13 , but as soon as he does , Number 13 kills him . 


Who is Juzo Murasaki's supervisor at his construction job?