The vertebrae protect the spinal cord from injury. Sensory receptors in joints between bones send signals about body position to the brain. The brain regulates the position of bones by controlling muscles. The cardiovascular system delivers oxygen, hormones, nutrients and white blood cells around the body by pumping blood, and it removes waste products. Heart, blood vessels Endothelial cells maintain the blood-brain barrier .
Baroreceptors send information to the brain about blood pressure.
Cerebrospinal fluid drains into the venous blood supply. The brain regulates heart rate and blood pressure. Muscular System Different types of muscles enable motion, generate heat to maintain body temperature, move food through digestive tract and contract the heart. Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle.