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.
1 The Brain Lobes The brain is a soft, sensitive organ that weighs about three pounds and yet controls everything in the entire human body. 2  The human brain is large and advanced, especially whâ¦. 3  The Various Functions of the Forebrain The brain is divided into three parts-the forebrain, midbrain, and hindbrain.here are three main divisions of the frogs brain. The fore-brain  contains olfactory lobes, a pair of cerebral hemispheres, and  unpaired diencephalon.