These images use color markers—blue for nuclei, red for cell membranes, and green for fluid—to show that spaces between cells shrink as fluid moves out during tissue compression, from left to right ...

Water makes up around 60 percent of the human body. More than half of this water sloshes around inside the cells that make up organs and tissues. Much of the remaining water flows in the nooks and ...

Cardiac muscle tissue, or myocardium, is a type of muscle tissue that forms the heart. It contracts and releases involuntarily and keeps the heart pumping blood around the body. The human body ...