Body Systems

4. - The essential gas inhaled by the lungs, critical for cellular respiration.
5. - System made up of bones that provides structure, protection, and movement support.
6. - The body system responsible for gas exchange, bringing oxygen into the body and expelling carbon dioxide.
10. - Collective term for the interconnected structures in your body responsible for specific functions, from circulation to digestion.
12. - Related to the molecular substances that participate in the body’s metabolic processes.
14. - Macromolecules made of amino acids, essential for building and repairing tissues.
15. - Organs where oxygen is absorbed and carbon dioxide is expelled.
17. - A waste product of cellular respiration, exhaled through the lungs.
18. - A group of organs working together to perform specific bodily functions.
19. - The part of the nervous system that includes the brain and spinal cord.

1. - The system that controls both voluntary and involuntary actions, consisting of the brain, spinal cord, and nerves.
2. - The body system that allows movement, posture, and heat production.
3. - The purpose or activity for which a system or organ exists.
7. - The column of bones that protects the spinal cord and supports the body.
8. - The body’s largest organ, serving as a protective barrier against environmental threats.
9. - A bundle of fibers that transmits electrical signals throughout the body.
10. - The organ that acts as the control center for the body’s activities, processing sensory information and regulating functions.
11. - The red fluid circulating through the circulatory system, delivering oxygen and nutrients.
12. - The system responsible for transporting blood, nutrients, and gases throughout the body.
13. - System responsible for breaking down food and absorbing nutrients.
16. - Part of the digestive system where most nutrient absorption occurs.