Dumb isn’t necessarily a human characteristic. i suppose it will depend on the context.
Blood is the fuel that keeps you going! Oxygenated blood is brought to organs and tissues via the arteries, while veins bring deoxygenated blood back to the heart to be replenished. The point is, without the respiratory system your blood would be useless.
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
An ancient medicinal plant
Answer:
Compared to the Sun, all other stars look like points of light in the night sky because the stars are much farther away than the Sun.
