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 lymph capillaries, lymph vessel and lymphatic duct

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Difference between lymph capillaries, lymph vessel and lymphatic duct 

 

Lymph vessels

Collect lymph

Drain lymph into the

Number

Lymph capillary: they begin blindly in the tissue space around the blood capillaries

LC collect lymph from tissue space

Afferent lymph vessels

Many

Lymph vessels

 

 

 

Afferent lymph vessels

Collect lymph from lymph capillary

Adjacent lymph node

Many & located around the capsule of lymph node

Efferent lymph vessels

Collect lymph from lymph node

Drain lymph into terminal lymphatic ducts

One in number, exit lymph node through in hilum

Terminal lymphatic duct : two in number

 

 

 

i) right lymphatic duct

Collect lymph from right side of head and neck, right upper limb & chest

Drain lymph into the venous system at the junction between right  internal jugular vein and rt subclavian vein

 

ii) thoracic duct

Collect lymph from whole body except right side of head and neck, right upper limb & chest

Drain lymph into the venous system at the junction between left internal jugular vein and left subclavian vein

 

 

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