Which of the following is NOT a function of blood?

Correct option is A

• Blood is a connective tissue that performs transportation, protection, and regulation in the human body.
• It is composed of plasma, red blood cells (RBCs), white blood cells (WBCs), and platelets.

Blood performs the following essential functions:

• Transports oxygen and carbon dioxide (gases) via RBCs.

• Transports hormones from endocrine glands to target organs.

• Transports waste materials, such as urea and carbon dioxide, to excretory organs.

However, synthesis of starch is a plant-specific function. Plants produce starch via photosynthesis and store it in plastids. 

• Plasma (the liquid component of blood) carries nutrients, waste products, hormones, and other dissolved substances.
• RBCs (Erythrocytes) carry oxygen from lungs to tissues and CO₂ back to the lungs.
• WBCs (Leukocytes) play a role in immunity and defense against pathogens.
• Platelets help in blood clotting to prevent excessive bleeding during injury.
• Blood also maintains body temperature and pH balance.