Posts

Showing posts from April, 2019

Comparison between tract and nerve

-
  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...
Post a Comment
Read more

Difference between the internal and external urethral sphincter

-
Image
Difference between the internal and external urethral sphincter  Internal urethal sphincter External urethal sphincter Surrounds the internal urethral orifice Surrounded by membranous part of urethra Derived from the bladder musculature of trigonal region Derived from the sphincter urethane muscle Innervated by the sympathetic fibres (T 11-L2 segments) Innervated by the somatic fibres (S2-4 segments) Involuntary Voluntary
Post a Comment
Read more

Difference between shapes of the proximal surfaces of the base of the 1st , 2nd , 3rd , 4th and 5th metatarsal bones and their articulation

-
Image
Difference between shapes of the proximal surfaces of the base of  the  1 st , 2 nd , 3 rd , 4 th and 5 th metatarsal bones and their articulation                                                                              1st metatarsal                                                             ...
Post a Comment
Read more

Difference between the locking and unlocking of the knee

-
Image
Difference between the locking and unlocking of the knee  Locking of the knee joint Unlocking of the knee joint Medial rotation of the femur on tibia during terminal phase of extension Lateral   rotation of the femur on tibia during initial   phase of flexion It is brought about by quadriceps femoris It is brought about by the popliteus muscle Locked knee becomes absolutely rigid Unlocked knee can be further flexed All ligaments are taut All ligaments are relaxed
Post a Comment
Read more

Difference between right two-third of transverse colon and left one third of transverse colon

-
Difference between right two-third of transverse colon and left one third of transverse colon  Features right two-third of transverse colon left one third of transverse colon Development From midgut From hind gut Arterial supply Middle colic artery a branch of superior mesenteric artery (artery of midgut ) Left colic artery, a branch of inferior mesenteric artery (artery of hind gut ) Nerve supply By vagus nerve By pelvic splanchnic nerve
Post a Comment
Read more