A fenestrated tracheostomy tube contains openings that allow air to pass through the area of the throat that leads to the mouth and nose. In a tracheostomy, a surgeon creates an opening in the front ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

It may contain inaccuracies due to the limitations of machine translation. The appearance of capillaries in the brain, retina, heart, adrenal gland, bone, and liver (clockwise from top left). The form ...