the circulatory system, the heart rate increases and blood flow increases to the exercising muscles, and lessens to the other parts of the body. Your respiratory system doesn't change except for the amount of air flow. (Addition): When your heart rate increases from anything in general, you tend to breathe heavier and faster depending on the amount of pressure your heart is being put into.
a very broad question however this is what i know
circulatory, when exercising the heartrate will increase to compensate for a higher oxygen demand in the muscles, blood pressure will thus increase aswell
also when the body starts to warm up, which the brain sensors in its thermoceptors it will start vasodilating, where the blood vessels close to the skin expand/open up to allow more blood flow close to the skin(that's why people go red) and let out heat through radiation, which if is continued after a long time will encourage sweat.
breathing rate will also increase for obvious reasons... an increase in Co2(bodys waste) and lower oxygen levels make you breath faster
respiratory... roughly the first ten seconds of any exercise willl use the ATP-CP (adenisine tri-phosphate-creatine phosphate), which is engergy that doesnt require any oxygen(aneorobic) aswell as the next 40 seconds of exercise will use the lactic acid energy system (also aneorobic) however it needs oxygen to break down to prevent muscle cramps, nausea etc. 1 minute of exercise upwards will use aerobic energy(the use of oxygen) where instead of reactions in the cytoplasm of the cell(anaerobic) the aerobic energy is created within the mitochondria of muscle cells where the oxygen will bind with glucose atoms to create ATP-CP energy, this is done in all long distance running. that is all the three energy systems realted to the repiratory system and im pretty sure ive covered evrything in circultory, oh and in circulatory blood vessels to non vital organs(digestive organs) are constricted to create a stronger abundance of bllod where its needed(muscles)
your penis gets bigger
it changes
life changes some
When the trachealis muscle contracts, it reduces the diameter of the trachea, helping to regulate airflow and adjust resistance in the respiratory system. This action can be particularly helpful during activities that require increased respiratory effort, such as exercise or periods of high air demand like during coughing or sneezing.
they get emotional. and moood swings.
During heavy exercise, both lung volumes and capacities increase. This is because the body requires more oxygen to meet the oxygen demand of the muscles. As a result, the respiratory rate and depth of breathing increases, allowing more air to be inhaled and exhaled, leading to the expansion of lung volumes and capacities.
The pressure in the pulmonary artery increases during exercise if the cardiac output increases.
you wouldn't be losing any fat.
You have to be confident about your self. You have to remember that these changes are for the good and keep a positive attitude.
it starts to get hot and people go outside
The effect exercise has on the respiratory system is that it helps the blood to circulate in the body and so it and the circulatory system have linked together to help in the living of the human body.The respiratory system helps to get rid of unwanted substance in the body (eg.blood)
Behavioral changes that may happen to boys and girls during puberty, is that they may have bigger attitudes. They may struggle with self esteem, and may become rebellious.