Mary: respiratory=breathe

Correct: Respiratory - relating to breathing.

Mary: circulate=I don't know.

Correct: Circulate - to move around.

Marry: Blood Vessel=a lot of blood

Correct: Blood Vessel - a small tube in the body where in blood flows.

Marry: digestive=disgestive power

Correct: Digestive -  relating to the digestion of food

Mary: break down=break

Correct: break down - to smash, split, or divide into parts; to stop moving or working.  

Mary: breath=most important

Correct: breath - the air that comes out of your lungs

Thank for submitting your homework. Please study the meaning of these words because these can be helpful for your vocabulary improvement. I'll so you again next week Mary. Keep up the good work.

Teacher Lyn^^