Answer:
intrinsic factor, a protein produced in the stomach
<span>The question says,'what can be the cause of weakened muscle and kidney functioning. Lack of muscle use can cause weakened muscle and kidney diseases can cause a build up of toxins in the blood, due to slow filtration by the kidney. This can also leads to muscle weakness and tiredness, because the ability of the blood to carry oxygen to the muscles has been drastically reduced.</span><span />
Answer:
Cell, tissue, organ, organ system, and the organism level.
Explanation:
Organization of the human body includes cell, tissue, organ, organ system, and the organism level. Cell is the structural and functional unit of all living organisms. When a group cells join together to perform similar function, it is called tissue. When tissues join together to form an organ and different organs combine together to form organ system. Different organ system combine together to form an organism. Anatomical terminology is a form of scientific terminology used by anatomists such as inferior, superior, anterior and posterior etc are used for different parts of body.
