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

Difference between cervical, thoracic and lumbar vertebra

-

Difference between cervical, thoracic and lumbar vertebra 

Topic
Cervical
Thoracic
Lumbar
body
1. Smallest of all vertebra
2.Transverse measurement is greater than anterior posterior measurement
3.Superior surface is concave
1.Body is heart shaped 2.Anterior posterior measurement is greater than the transverse measurement
3. body bears costal facet

1.Body is big size and kidney shaped
2. Transverse measurement is greater than anterior posterior measurement
3. body is thick in front than behind
Transverse process
1.It is pierce by foramen transversarium
2.It has anterior and posterior root which is connected by costo-transverse bar
1. Big size face laterally and backwards 
2. Each process bears a facet which articulate with numerically corresponding tubercle of rib
1. Thin and elongated
2. An accessory process is present at its posterior inferior process
Spinous process
Short , bifid and horizontal
It is directed downward and backward
It is end with tubercle
It is quadrangular in shape and lies horizontally
Laminae
Long and narrow
Short , broad & thick
Short , strong and broad

Pedicle
Project laterally and backwards
Project directly backwards
Short and strong and project from postero-lateral aspect of the body  
Superior articular process
Faces upwards and backwards
Faces upward, backward & laterally
Concave process face backward and medially
Inferior articular process
Faces downwards and forwards
Faces forwards, medially and downwards
Convex process faces forward and laterally
Vertebral foramen
Triangular in shape
Large in proportion to the size of the body
Circular in shape
Size is smaller
Triangular in shape
Larger than thoracic vertebral but smaller than cervical vertebra
Special feature
Foramen transversarium
Costal facet present on  the body
Massive body
Mamillary process is present at the posterior border of superior articular process




Comments

Post a Comment

Popular posts from this blog

Difference between relations of right and left suprarenal gland

-
Difference between relations of right and left suprarenal gland Topics Right suprarenal gland Left suprarenal gland Anterior surface Medial inferior vena cava Lateral right lobe of liver including bare area Superior stomach Inferior splenic artery & pancreas Posterior surface Inferior kidney Superior right crus of diaphragm Medial crus of left diaphragm Lateral kidney Medial border Right celiac ganglion Right inferior phrenic artery   Left   celiac ganglion Left   inferior phrenic artery Left gastric vessels Hilum Near the upper end Near the lower end Peritoneal relations Not related with peritoneal except a tiny area below Related to peritoneum of omental bursa which separates it from stomach
Read more

Fibroblast vs fibrocyte

-
  Fibroblast  is permanent  connective tissue cell responsible for the production of the extracellular matrix (ECM) and collagen fibers which  are essential for tissue structure and repair and play a major role in wound healing. unique features of Fibroblasts : Shape and Structure :  Spindle-shaped (elongated). it contain l arge nucleus that is oval or elliptical . and c ytoplasm is abundant and basophilic (stains blue), reflecting active protein synthesis. and it has  prominent nucleolus , indicating high activity in protein synthesis. Function : it produces the structural components of the extracellular matrix like collagen , elastin , glycosaminoglycans , and proteoglycans .  In response to injury, fibroblasts proliferate and migrate to the site of injury, secreting growth factors and ECM components to promote tissue repair and fibrosis. Major producer of collagen fibers which provide tensile strength to tissues. Elastin Production : ...
Read more