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Which of the following describes external respiration?

Oxygen diffuses out of the blood into the tissue cells.

Carbon dioxide diffuses from the tissue cells into the blood.

There is an exchange of gases between the lung alveoli and the blood capillaries.

All of the above

International social workers work on global level and play a key role in improving quality of life for

Asap during the past few weeks or months, have you noticed any exercises that have become too easy for you? do you think you need to increase the intensity in any of the three exercise areas in your workouts? evaluate your exercise progress in the three exercise areas (cardiovascular, resistance, and flexibility) and list what modifications, if any, you may need to make in your exercise routine.

What are 6 levels of organization for anatomy and psychology