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Sinus (Noun)

A wide channel containing blood; does not have the coating of an ordinary blood vessel.

Nouns denoting body parts.

The liver contains a network of sinus that allows it to filter and detoxify the blood.
The sinus in the liver is a unique structure that facilitates the exchange of nutrients and waste products.
The sinus in the spleen is responsible for filtering the blood and removing old or damaged red blood cells.
The sinus in the bone marrow is a site of blood cell production and maturation.
The sinus in the liver is lined with specialized cells called Kupffer cells that help to remove bacteria and other foreign particles from the blood.

An abnormal passage leading from a suppurating cavity to the body surface.

Nouns denoting body parts.

A small sinus tract connected the infected cyst on his arm to the surface of the skin, oozing pus constantly.
After a nasty bout of mastoiditis, she was left with a persistent sinus leading from the abscess to her scalp.
Surgical drainage was required to remove the collection of pus and close the sinus that had formed from the inflammatory process.
His doctor explained that a small sinus had developed from the boil on his neck, making it difficult to heal completely.
The abscess on his leg had formed a deep sinus that needed to be excised and cleaned before the wound could start healing properly.