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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 pectoral and pelvic girdles

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Difference between pectoral and pelvic girdles Pectoral girdles Pelvic girdles Ossification both intramembranous and intracartilaginous Ossification: only intracartilaginous   It is situated in the shoulder region. It is situated in the hip region. The glenoid cavity of the scapula forms ball and socket joint with the humerus. A cup-shaped cavity called acetabulum forms ball and socket joint with the femur. The glenoid cavity present in the pectoral girdle is comparatively shallow. Acetabulum cavity present in the pelvic girdle is comparatively deep. It gives articulation to forelimb  bones. It gives articulation to hindlimb bones. The back muscles are attached to the pectoral girdle. The hip muscles are attached to the pelvic girdle. Two principal components clavicle and scapula remain separate Three ...
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Difference between greater sac and lesser sac

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Difference between greater sac and lesser sac Greater sac Lesser sac The greater sac , also known as the general cavity (of the abdomen) or peritoneum of the peritoneal cavity proper , is the cavity in the abdomen that is inside the peritoneum but outside the lesser sac It is connected with the lesser sac via the omental foramen also known as the foramen of Winslow or epiploic foramen , The lesser sac , also known as the omental bursa , is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the omental foramen It extends across entire area of abdomen and from diaphragm to  pelvic floor irregular space that lies behind liver, lesser omentum, stomach, upper ant part of greater omentum 5 recesses: Subphrenic recess – peritoneal pocket between diaphram & antero superior  part of liver separates into...
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Difference between greater omentum and lesser omentum

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Difference between greater omentum and lesser omentum Greater omentum Lesser omentum The greater omentum is a large apron-like fold of  peritoneum that hangs down from the greater curvature of stomach. It extends from the greater curvature of the stomach, passing in front of the small intestines and doubles back to ascend to the transverse colon before reaching to the posterior abdominal wall The lesser omentum ( small omentum or gastrohepatic omentum ) is the fold of  peritoneum that attached with lesser curvature of the stomach. it extends from the liver to the lesser curvature of the stomach (hepatogastric ligament) and the first part of the duodenum (hepatoduodenal ligament). It has four layers It has two layers It has three subdivision Gastrophrenic ligament—extends to the underside of the left dome of the diaphragm Gastrocolic ligament—extends to the transverse colon(occasionally on its ow...
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Difference between medial and lateral longitudinal arches of foot

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Difference between medial and lateral longitudinal arches of foot Medial longitudinal arch Lateral longitudinal arch It is made up by the calcaneus, the talus, the navicular, the three cuneiforms (medial, intermediate, and lateral), and the first, second, and third metatarsals It is composed of the calcaneus, the cuboid, and the fourth and fifth metatarsals The medial arch is higher than the lateral longitudinal arch. It   is lower than the medial   longitudinal arch. It is formed by more bones and joints It is formed by less bone and joint It is more mobile It is less mobile It acts as shock absorber It commonly bears body weight Its summit is at the superior articular surface of the talus The peak of the lateral longitudinal arch is located at the level of articular facets on the superior outermost layer of the calca...
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