You are very smart, that is a fascinating question
Answer:
Development that takes place before the age of nine.
Primary sexual characteristics appear at birth and comprise both the external and internal genitalia (e.g., the penis and testes in men and the vagina and ovaries in women).
working in the cardio will help to tone your abs and burn excess fat, and the respiratory system, with it being in good health from the exercise, your oxygen intake and the release of carbon monoxide will definitely increase and become steadier..
