1.4 Levels of Organization

• Levels of organization from an organism starts at the chemical or molecular level, then the cellular level, then the tissue level, then organ level, then organ system, then organism
• Hydrogen, oxygen, carbon, and nitrogen consist of about 99% of atoms in the body
• Homeostasis


  stability, unchanging
• Hydrogen in the body is about

  62%
• Oxygen in the body is about

  26%
• Carbon in the body is about

  10%
• Nitrogen in the body is about

  1.5%
• Cyanosis is a medical condition in which a person's lips and fingertips turn blue due to the inadequate delivery of oxygen to the tissues. If a patient is exhibiting cyanosis, why should the heart be examined with the lungs?


  Because the heart is responsible for carrying oxygen by pitting them in red blood cells