haemoglobin

"The descriptive words in the student's essay painted a vivid picture of the historical event. "

"The transport of goods is not included in the price given on the website."

"The teacher marked the centre of the circle on the chalkboard before starting the geometry lesson. "

"The scientist carefully examined the substance to determine its chemical composition. "

"We need oxygen to breathe. "

"The box containing my old toys was stored in the attic. "

"Our lunch consists of a sandwich, an apple, and a drink. "

"Check the oil in your car once a month."

"My mother added extra protein to her lunch to help her build muscle. "

""The correct carries of the grocery bags prevented them from ripping." "

"The blood test revealed that her globulin levels were low, which could indicate a problem with her immune system. "

"Hemoglobin, the molecule that carries oxygen in our blood, contains a porphyrin ring with an iron atom at its center. "