A low hemoglobin count can also be due to blood loss, which can occur because of: 1  Bleeding from a wound. 2  Bleeding in your digestive tract, such as from ulcers, cancers or hemorrhoids. 3  Bleeding in your urinary tract.  Frequent blood 1  donation. Heavy menstrual bleeding.
The brain is the control centre for your body and it sits in your skull at the top of your spinal cord. The brain has three main parts. 1  The cerebellum (say se-re-bell-um). The brain stem, that controls a lot of the 'automatic' actions of your body such as breathing and heart beat, and links the brain to the spinal cord and the rest of the body.
The Human Brain. The human brain is a unique and complex structure; it facilitates vital and complicated physiological and psychological functions such as consciousness, mobility, emotion, and personality. Different parts of the brain are responsible for specific functions.he frontal lobe is the largest of the four lobes. The frontal lobe is responsible for many different functions involving conscious thought, voluntary movement, and personality. The frontal lobe also facilitates word choice, organization, and behavior.