From Cells to Systems
Get to Know About From Cells to Systems
Cells serve as the starting point. They generate energy and build proteins. They divide and renew. Some cells handle movement and others handle communication. Similar cells bind and form tissues. Muscle tissue drives force and nerve tissue sends signals. Connective tissue holds parts together.
Tissues join and form organs. The heart joins muscle, connective and nerve tissue. It pumps blood. The lungs expand and take in air. The liver processes nutrients. Organs team up to handle key tasks.
Organs link and build systems. The circulatory system moves oxygen and nutrients and clears waste. The respiratory system exchanges air and fuels cells. The digestive system breaks down food and captures fuel. The nervous system controls signals and guides actions. The immune system fights invaders and protects health. A problem in one area can ripple across the body. A failure in insulin cells leads to blood sugar trouble and impacts many systems.