The brain, primarily. The ears are the organs that mediate our sense of hearing, but listening is really a function of the brain. Listening is attending to what we hear. Think of the popular term 'selective hearing'. You might hear a great deal of noise, talking, music and excitement during a party. But you may be listening to the person you are trying to converse with while putting the other noise in the 'background'.
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To listening. To balancing.
Skin holds our body parts in.
transverse
Aerobic endurance involves the heart, lungs, and muscles. The heart pumps oxygen-rich blood to the muscles, the lungs provide oxygen to the blood, and the muscles use the oxygen to produce energy for sustained physical activity. Strengthening these body parts can improve aerobic endurance.
Nitrogen is present in various parts of the human body including amino acids which are the building blocks of proteins, nucleic acids in DNA and RNA, and in molecules such as urea and creatinine that are involved in waste excretion through urine.