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 cytotrophoblast and syncytotrophoblast

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Difference between cytotrophoblast and syncytotrophoblast 

Cytotrophoblast
Syncytotrophoblast
Inner layer of trophoblast
Outer layer of trophoblast
It is the trophoblastic stem cells
It is not stem cells
It has important role in implantation
It invades the wall of uterus
It is not establishes nutritional supply between mother to fetus
It establishes nutritional supply between mother to fetus
It can differentiated
It is terminally differentiated cell
This tissue  is formed by individual cell
This tissue is specialized and it is  multinucleated with no individual cell
This layer does not produce hormones
The syncytiotrophoblast secretes progesterone and leptin in addition to human chorionic gonadotropin (hCG) and human placental lactogen (HPL); hCG prevents degeneration of the corpus luteum.

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