The Nephron

The kidneys’ job is to filter blood, eliminating substances that the body doesn’t require. Excess water, salt, and urea are drawn out of the circulation and sent to the bladder, where they may be eliminated from the body as urine. As this is happening, the “clean” blood leaves the kidney and returns to the bloodstream.

The nephron is…[Read more]

Blood vessels make up the circulatory system, which transports blood to and from the heart. Blood is transported from the heart by arteries and returned to it via veins.

The circulatory system eliminates waste materials like carbon dioxide from the body and delivers hormones, nutrients, and…[Read more]

Nervous Tissue

Neurons and glial cells make up the two cell types that make up nervous tissue. The nervous system’s ability to compute and communicate is provided by neurons. To interact with target cells and with each other, they release chemical signals and are electrically active. Much smaller than neurons, glial cells—also known as glia or n…[Read more]