Answer:
Your heart is a single organ, but it acts as a double pump. The first pump carries oxygen-poor blood to your lungs, where it unloads carbon dioxide and picks up oxygen. ... The second pump delivers oxygen-rich blood to every part of your body. Blood needing more oxygen is sent back to the heart to begin the cycle again.
Explanation:
The first one is atoms cause they are all the same type of particles. The blue one is the molecules that is not compound cause they aren't connected to each other. The other two are compound cause two atoms of two different elements are bonded together.
The difference between psychologists and psychiatrists is that a psychiatrist
is a medical doctor and a psychologist is not a doctor. The three medical services
that a psychiatrist can provide but a psychologist cannot are:
As psychiatrist is a medical doctor, he can prescribe medicines to
treat mental health, he is allowed to order for brain images like CT scan, MRI
etc. where a psychologist cannot. He can also order to perform laboratory test<span>s.</span>
