The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
        
                    
             
        
        
        
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Many of the spices in our food are added to balance nutrition and to keep us healthy. They add flavour and nutrients to dishes without fat or calories. Spices like cumin, mustard, pepper, cloves, fennel, cinnamon and turmeric are very important in Indian food.
Chilies: Boasting high amounts of vitamin C and antioxidants, chillies have been found to help prevent lifestyle diseases including some cancers and stomach ulcers. Meanwhile, their ability to create heat within the body has also linked the peppers to weight loss as well as lowering the risk of type
Coriander or cilantro is a wonderful source of dietary fiber, manganese, iron and magnesium as well. In addition, coriander leaves are rich in Vitamin C, Vitamin K and protein. 
Turmeric — and especially its most active compound, curcumin — have many scientifically proven health benefits, such as the potential to improve heart health and prevent against Alzheimer's and cancer.
Using cumin as a spice increases antioxidant intake, promotes digestion, provides iron, may improve blood sugar control and may reduce food-borne illnesses. 
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Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. It is like a solar panel that changes sunlight energy into electric energy. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast.