HHMI has selected 24 schools in the first round of the Inclusive Excellence initiative, a program that aims to help increase the capacity of colleges and universities to effectively engage all ...

Skeletal muscle cells are long and thin and can contain multiple nuclei. These cells fuse end to end with their neighbors to form myotubes, which then collectively form muscle fibers. When bundled ...

Do you notice the tiny red-ringed dots in this image? Those little spots are HIV particles. They are concentrated on contact points in the brain between an infected immune cell and an uninfected ...

This cross section through several mouse testes shows how sperm are made and maintained. The testes are where sperm cells are made. A human male can produce between 70 million and 150 million sperm ...

Mesenteric adipose tissue is fat that surrounds the intestines in the abdomen of mammals. This tissue contains hematopoietic cells – a subset of stem cells that can turn into different kinds of blood ...

RSV is a common reparatory virus that can infect humans of any age but that’s especially dangerous in children and the elderly. The virus can cause more severe symptoms in these two populations ...

What am I looking at? This is an image of the blood vessels and pericytes in the spinal cord of a mouse. The blood vessels are shown in purple (1) and the pericytes in green (2). Biology in the ...

This video depicts the orderly flow of blood cells, one by one, through the tiniest blood vessels in the tailfin of a fish. The circulatory system in fish serves the same purpose as it does in humans ...

Red blood cells carry essential oxygen from the lungs to the rest of the body using a protein called hemoglobin. Red blood cells are unusual because they do not have nuclei. During pregnancy, ...

Skin is pretty amazing. It is our largest organ, accounting for about 15% of our body weight. It protects our insides from the outside world, cools us off, and keeps us warm. To keep it intact, the ...

What am I looking at? This video shows the wide range of microorganisms that live in the gut of a termite – an insect famous for feeding almost exclusively on wood. Biology in the background Termites ...

The little green dots interspersed throughout this image of densely packed blood vessels around a zebrafish brain are the garbage collectors of the central nervous system. These cells are thought to ...