Red blood cells contain the protein . when red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into . the liver further converts it into , which is stored in the . when you eat fat, the cells of your small intestine release the hormone . contraction of the forces the into the , where it emulsifies fats and aids in their digestion.

Red blood cells contain the protein HEMOGLOBIN. When red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into a GREEN PIGMENT CALLED BILIVERDIN. The liver further converts it into BILIRUBIN WHICH IS RELEASED INTO THE PLASMA AND IS RECIRCULATED IN THE LIVER AND IS THEN BOUND INTO ALBUMIN which is stored in the GALLBLADDER AND EXCRETED IN THE DIGESTIVE SYSTEM IN THE FORM OF BILE. When you eat fat, the cells of your small intestine release the hormone UROBILINOGEN where contraction of them forces them into the SMALL INTESTINE where it emulsifies fats and aids in their digestion.

The correct answer given below:

Explanation:

Red blood cells contain the protein Haemoglobin. When red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into Bilirubin. The liver further converts it into Bile which is stored in the Gall bladder. When you eat fat, the cells of your small intestine release the hormone Cholecystokinin. Contraction of the Gall bladder forces the Bile into the Duodenum, where it emulsifies fats and aids in their digestion.

i think it is dna, i'm not totally sure but i think it might be.