Illustration of a human sperm cell

Colorized antique illustration of the human brain

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

"Photomicrograph of Trichinella spiralis cysts seen embedded in a muscle tissue specimen, in a case of trichinellosis"

Colorized SEM of two rod-shaped carbapenem-resistant Klebsiella pneumoniae (CRKP) bacteria (yellow) interacting with a human neutrophil white blood cell (green)

"Diffusion MRI, also referred to as diffusion tensor imaging or DTI, of the human brain"

Colorized SEM of four spherical methicillin-resistant Staphylococcus aureus (MRSA) bacteria (purple) in the process of being phagocytized by a human neutrophil white blood cell (blue)

Colorized SEM of two spherical methicillin-resistant Staphylococcus aureus (MRSA) bacteria (yellow) in the process of being phagocytized by a human neutrophil white blood cell (blue)

Human head muscle, illustration

Human blood cells, illustration

Human thigh muscle, illustration

Human thigh muscle, illustration

Human red blood cells, illustration

Human muscle

Human red blood cells, illustration

Human red blood cells, illustration

Human red blood cells, illustration

Human red blood cells, illustration

Human artery with blood cells, artwork

Human shoulder muscle

Human sperm cells, artwork

Human neck muscle, artwork

Human back muscle pain, artwork

Human muscle aldolase, molecular model

Human red blood cells, artwork

Human masseter superior muscle, artwork

Human masseter superior muscle, artwork

Human red blood cells, artwork

Human red blood cells, artwork

Microscopic view of human B-cells.

Microscopic view of human B-cells.

Microscopic view of human B-cells.

Illustration of human muscle cells