Explanation: These students all show signs of serious mental health issues and should seek a professional's help. Melanie seems to be showing signs of anger management issues, which could get her in trouble in the world and isn't a healthy mindset to have. Darius is showing signs of having depression, as people with depression tend to shy away from things that once were enjoyable to them. Cody seems to be struggling with an eating disorder. All of these people should reach out to a mental health service for assistance.
The other students just show signs of normal anxious behaviors, and do not need professional assistance, as their emotions will change after the subject of their worrying has passed, while the others will need continuous help to overcome the problems they're facing.
Personal hygine is going to affect your health in some shape or form, but not 100% of the time. Genetics, where you live, and age also play a HUGE roll in whether or not you're going to fall ill (and that is just a small list).
The pulmonary artery and its branches deliver blood rich in carbon dioxide (and lacking in oxygen) to the capillaries that surround the air sacs. The circulation of the blood through the lungs. The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
