tubule
Minuscule hollow cylinder
A tubule is a very small tube, especially in anatomy and biology.
The kidney contains millions of tiny tubules that filter blood.
Plant cells have tubules that transport materials.
The word appears almost exclusively in scientific contexts: The proximal tubule reabsorbs most of the filtered glucose.
Kidney's filtration unit
- glomerulusCapillary knot filtering blood
- renalOf the kidneys
- capillarySmallest blood vessel
- arterioleSmallest arterial branch
venule · bronchiole · alveolus · microvilli · cilia · epithelium · endothelium · lymphatic
Kidney's filtration unit
- glomerulusCapillary knot filtering blood
- reabsorptionReclaiming filtered substances internally
- secretionSubstance released by glands
- urineRenal excretion fluid
kidney · aquaporin · permeability · osmosis · diffusion · solute · electrolyte · creatinine
Empty within
- cylindricalCircular in cross-section
- microscopicToo small for eyes
- lumenLight output measure
- elongatedStretched beyond usual dimensions
narrow · coiled · branching · membrane · wall · opening · diameter · cross-section
nephron
Kidney's filtration unit
- glomerulusCapillary knot filtering blood
- renalOf the kidneys
- capillarySmallest blood vessel
arteriole · venule · bronchiole · alveolus · microvilli · cilia · epithelium · endothelium · lymphatic · proximal
nephron
Kidney's filtration unit
- glomerulusCapillary knot filtering blood
- reabsorptionReclaiming filtered substances internally
- secretionSubstance released by glands
urine · kidney · aquaporin · permeability · osmosis · diffusion · solute · electrolyte · creatinine · urea
hollow
Empty within
- cylindricalCircular in cross-section
- microscopicToo small for eyes
- lumenLight output measure
elongated · narrow · coiled · branching · membrane · wall · opening · diameter · cross-section · cavity
- tubular bellsStruck metal tube instrument
- tubular steelHollow cylindrical metal sections
- tubular reabsorptionNephron recovery of filtered substances