Red blood cells can be compared to soldiers, as both are essential for their respective roles in sustaining life and health. Just as soldiers work to protect and serve their community, red blood cells transport oxygen throughout the body, ensuring that organs and tissues function effectively. Both are critical components of a larger system—soldiers in society and red blood cells in the circulatory system—working tirelessly to maintain balance and support overall well-being.
White blood cells.
red blood cells
White blood cells
red blood cells
Both red and white blood cells pass through the capillaries.
Capillaries are very thin blood vessels. Oxygen and nutrients and hormones can pass through the walls of the capillaries and reach the body's cells, while red blood cells remain in the capillaries.
Cells
capillaries
oxygen
blood
The brain has veins, capillaries, and arteries which contain blood cells.
Capillaries do not occur in cells.Capillaries are larger than cells, indeed capillaries are made of cells.Capillaries are the smallest blood vesicles.