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.
IMPORTANT BRAIN REGIONS RELATED TO COGNITION: 1  Amygdala: Responsible for emotional integration of sensory input and memories. 2  Basal ganglia: Located deep in the hemispheres. The basal ganglia are made up of the globus pallidus, caudate nucleus, and amygdala. 3  Brain stem: Connection from the spinal cord to lower areas of the brain. Responsible for autonomic functions such as heart rate, blood pressure, and the like. Motor and sensory neurons pass through the brain stem. Brocaâs area: Located in the left frontal lobe. Involved in the production of fluent.