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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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Microscopic difference between small and large intestine

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Difference between small and large intestine:  Microscopic difference or gross difference Features small intestine large intestine Gland intestinal gland in mucosa and Brunner’s gland at submucosa (only in duodenum) intestinal gland in mucosa plica circularis (fold of mucosa and submucosa) present absent villi (projection of mucosa ) present absent    Peyer’s patches   present epiploiec appandages (aggregated lymphoid follicles) present absent   Taeniae coli (longitudinally arranged smooth muscle cells , thicken in three location   absent present Microvilli present absent Lining epithelium simple columnar epithelium with occasional goblet cells, panath cells, enteroendocrine cells,microfold (M cell) ,cup cell,Tuft c...
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difference between small intestine and large intestine: macroscopic or gross difference

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Difference between small and large intestine:  Macroscopic difference or gross difference Features small intestine large intestine length 4.5 to 7 m 1.5 m diameter 3.5-4.5 cm 4-6 cm parts It has three parts: duodenum, jejunum, ileum it has four parts: caecum, colon( ascending colon, transverse colon, descending colon, sigmoid colon) , rectum & anal canal  Haustration absent present epiploiec appandages absent present Peritoneum most of the part is covered by peritoneum except duodenum(retro- peritoneal )  most of the part is intra peritoneal some parts of large intestine is covered by peritoneum except ascending and descending colon, rectum and anal canal other part of large intestine is covered by peritoneum peritoneal fold the mesentery mesoappendix, transverse mesocolon, sigmoid colon, mobility m...
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difference between spermatozoa and ovum

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Difference between spermatozoa and ovum  Topics Spermatozoa Ovum size small head 5.1 μ m and tail 50 μ m largest cell of human body 0.15 - .2 mm shape head, neck ,middle piece and tail round nucleus nucleus condense with no nucleoplasm   nucleus is bloated with nucleoplasm centriole present absent cytoplasm very scanty abundant covering surrounded by cell membrane surrounded by cell membrane and zona pellucida motility highly motile no motility internally inactive and immotile internally active and motile types : according to sex chromosome two types of cells : 22X 22 Y one type of cell Only 22X mitochondria exclude during fertilization include during fertilization Life span 3-5 days 12-24 hrs Metabolically passive active DNA...
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Difference between spermatogenesis and oogenesis

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Difference between spermatogenesis and oogenesis Topics spermatogenesis oogenesis commencement puberty intrauterine life  duration 60-65 days 10-50 years  number of cells produce in each meiotic division  4 spermatid forms one ovum and two polar body  gamete production in adult life  300-500 million per ejaculation 1 ovum per menstrual cycle  termination continued until death end after menopause (45 to 50 years )  
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Difference between proximal and distal convulated tubule of kidney

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Difference between proximal and distal convulated tubule topics proximal convulated tubule distal convulated tubule diameter 40-60 μ m 20-50   μ m lumen small and irregular due to microvilli large and regular lining epithelium cuboidal with large number of microvilli (brush border) cuboidal no brush border staining acidophilic , more pink due to large number of mitochondria less acidophilic less pink number of cells in each cross section cells size are larger so number of cells are less in cross section of proximal convulated tubule   cell size are smaller so more number of cells are found in cross section of distal convulated tubule Cytoplasm more less
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Difference between male and female skull

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Difference between male and female skulls Topics Male skull Female skull Superciliary arches and Prominent Not prominent glabella Prominent Not prominent Mastoid process Very prominent Not prominent Nuchal lines Very prominent Not prominent Frontal & parietal tuberosity Less prominent More Prominent Angle of mandible Everted Inverted Wt More Less Wall thickness Thicker Thinner Vault of skull flattened rounded  Capacity  More  Less  Tympanic plate Larger and margins are rounded Smaller and margins are less rounded Temporal line More prominent Less prominent ...
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