The muscles, tissues, and blood all are made up of:

by

A. Fats
B. Proteins 
C. Vitamins
D. None of  these

🧠 Explanation:

  • **Proteins** are essential building blocks of the body, forming muscles, tissues, enzymes, and blood components.
  • They help in the growth, repair, and maintenance of body structures and are crucial for healing wounds and recovering from illness.
  • Hemoglobin, which carries oxygen in the blood, is also made up of proteins.
  • Proteins are made of amino acids, some of which the body must get from a balanced diet as they cannot be synthesized internally.