Week 1-Body System

1. The body's defense force, protecting against harmful invaders like bacteria and viruses. - Immune
2. The body's largest organ system, providing protection and regulating temperature. - Integumentary
3. Central organ of the nervous system that controls thoughts, emotions, and actions. - Brain
6. This system serves as the foundation for our physical existence and supports the body's stability and mobility. - Skeletal
7. The largest organ in the integumentary system that protects against external threats. - Skin
10. A drainage and purification network that removes waste and toxins. - Lymphatic
12. The body's air purifier, ensuring a constant supply of fresh air through gas exchange. - Respiratory
15. This system breaks down food into absorbable nutrients for energy, growth, and repair. - Digestive
17. Releases hormones that regulate various bodily functions and maintains homeostasis. - Endocrine
18. Chemical messengers released by the endocrine system that regulate various bodily functions. - Hormones

1. Cells that protect the body from harmful invaders in the immune system. - Immune Cells
4. The primary organ of the cardiovascular system that pumps blood throughout the body. - Heart
5. Also known as the circulatory system, it plays a vital role in circulating blood throughout the body. - Cardiovascular
8. The powerhouse of movement, allowing us to perform actions from blinking to climbing. - Muscular
9. Organs in the urinary system that filter waste from the blood. - Kidneys
10. Major organs in the respiratory system responsible for gas exchange. - Lungs
11. A complex network that facilitates communication, coordination, and control throughout the body. - Nervous
13. The body's filtration system, removing waste and regulating fluid and electrolyte levels. - Urinary
14. Ensures the continuation of the human species through the production of sperm and eggs. - Reproductive
16. Structures in the skeletal system that provide support and protect vital organs. - Bones