Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between blood capillary and lymphatic capillary

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Difference between blood capillary and lymphatic capillary

Blood capillary
Lymph capillary
basal lamina is present
absent
pericytes are present
absent
permeable to crystalloid
permeable to colloids
increase pressure of tissue fluid  collapse blood capillary
increase pressure of tissue fluid the lymph capillary lumen remains patent
it is the continuation of arteriole
it start as blind end tube
it is present in central nervous system
it is absent in central nervous system
blood capillary end into  venule
lymph capillaries  end into lymphatic vessel which is connected by lymph node
its diameter smaller than lymph capillary
its diameter more than the blood capillary
endothelium is usually continuous
one end of the endothelium is overlap so lymph enter to the capillary but cannot out
it is not attached with anchoring filament
it is attached with anchoring filament made by elastic fibres

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