Respiration in humans is controlled by medulla, which is a part of the brain. The medulla is responsible for the provision of adequate amount of oxygen for every activity. Medulla sends signals to our body to provide oxygen for every activity like sleeping, eating, walking, exercising etc. Human brain measures the level of carbon dioxide in blood and makes necessary adjustments to balance the amount of oxygen and controls respiration rate. Breathing is controlled by the brain but it can be controlled voluntarily also like holding ones breath. But this is just temporary and the medulla takes charge again after a few minutes to restore the breathing.
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The breathing is controlled by the respiratory center. The heart rate is controlled by the rhythmic contractions of the SA node. SA node has fastest rhythm of contraction, of all the cardiac cells. So it is the 'Pace maker' for your heart.
The medulla oblongata which is in the lower half of the brain stem controls heart rate and breathing.
The part of the brain stem that controls heartbeat and breathing is called the medulla.
The adrenal medulla is the part of the brain responsible for the release of adrenaline, when the adrenaline is released into the blood, the SAN is stimulated to work faster and increase your heart rate, this happens when playing sport or during your fight or flight response. However, the heart is not controlled by your brain as it is a myogenic muscle (self-exciting) this means that if you were to remove the heart from a body it would continue to beat. The sino-atrial node is responsible for the excitation of the heart. :) Hope this helps. Steph :)
The medulla oblongata, often just referred to as the "medulla", controls autonomic body functions. It is the lower part of the brain stem.The brainstem, which is composed of the Medulla, Pons and the Midbrain. It runs all the involuntary muscles and control the breathing, digestion and blood circulation.The cardiovascular center in the medulla oblongata.
The cerebrum
the medulla oblongata which is in the brain