Answer:when you cough blood leaves your heart.
Explanation: I saw a video and when some one coughed blood came out of the heart.
Answer:
lifting weights.
cycling.
push-ups, sit-ups and squats.
Explanation:
They all have sanitary/cleaning qualities.
Answer:
physical contamination
Explanation:
Hope this helps, and please mark me brainliest if it does!
Because they are aside from the nervous system, the most important systems in your body. Without these systems you would not be able to circulate nutrients, expel and transport wastes like CO2, And just about keep you alive. In healthcare, you come to know that without a heart beat or an airway, your patient will die.