Examlex
Research with adopted children
Membrane
A selective barrier that allows the passage of certain substances while preventing others, commonly found in cells and organelles.
Organ
A group of tissues in a living organism that have been adapted to perform a specific function, such as the heart or liver.
Cavity
An empty or hollow space within the body or one of its organs, often referring to areas like the abdominal cavity.
Blood Vessels
Tubular structures in the body responsible for transporting blood to and from the heart and throughout the body, including arteries, veins, and capillaries.
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