Examlex
Explain how the siphon-jet flushing action works.
Pericardium
The pericardium is the fibrous sac that encloses the heart, providing it protection and the lubrication needed for its movements.
Lubrication
The process or technique of using a lubricant to reduce friction and wear between two surfaces in contact.
Sphincter Muscles
Ring-like muscles that constrict or close a bodily passage or orifice to control the passage of substances.
Arterioles
Small blood vessels that branch off from arteries and lead to capillaries, playing a critical role in regulating blood flow and pressure.
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