difference between anatomy

Difference between sigmoid colon and rectum Sigmoid colon Rectum It begins at left pelvic brim as a continuation of descending colon and ends in front of the third sacral vertebra It begins as continuation of sigmoid colon in front of the third sacral vertebra and is continuous with the anal canal Length: 40 cm Length: 12 cm It is suspended from the posterior pelvic wall by a peritoneal fold the sigmoid mesocolon Upper 1/3 : anterior surface and both lateral surfaces are covered by peritoneum Middle 1/3 : only anterior surface is covered by peritoneum Lower 1/3 : devoid of peritoneum It is supplied by 3-4 sigmoid arteries derived from the inferior mesenteric artery It is supplied by superior rectal artery , branch of inferior mesenteric artery Middle rectal artery is a branch of the anterior division of each internal iliac artery Inferior rectal artery , a branch of ...

Difference between white adipocyte and brown adipocyte White adipocyte Brown adipocyte This type of adipocytes are predominantly found in adult Brown adipose tissue is present in humans during fetal life but diminishes during the first decade after birth. Distribution: subcutaneous tissue, breast, greater omentum, mesenteries, visceral pericardium, orbital cavity , retroperitoneal space, bone marrow  It is located on the back, along the upper half of the spine, and toward the shoulders. In adult it is gradually decreases. At  first decade of life it is situated in the cervical, axillary, paravertebral, mediastinal, sternal,and abdominal regions of the body. It then disappears from most sites except for regions around the kidney, adrenal glands, large vessels (i.e., aorta), and regions of the neck (deep cervical and supraclavicular), regions of the back (interscapular and paravertebral), and thorax (me...

Difference between gray matter and white matter Topics Gray matter White matter Composition Nerve cell body , Neuroglia, Processes , Blood vessels Neuroglia, Processes , Blood vessels Colour Light grey White Percentage Occupy 40% of brain Occupy 60% of brain Maturity Girl  11 years Boy 12 years  Girl 25 years Boy 20 years Sex difference Male 6.5 more gray matter Female   contain 10 times more  white matter Proportion of Men have higher proportion of white matter women have higher proportion of grey  matter Function It is the information processing region  of brain It makes connection between different information processing region of brain Oxygen use It uses almost 95% of oxygen It uses remaining  5% Loss of volume It v...

Difference between two tiny muscles of middle ear cavity : tensor tympani and stapedius muscles Topics Tensor tympani Stapedius Origin : Both cartilaginous and bony part of auditory tube Interior of pyramid which situated on the posterior wall of middle ear cavity Insertion Medial aspect of neck of malleus Posterior aspect of neck of stapes Blood supply Superior tympanic artery branch of middle meningeal artery Posterior auricular artery , a branch of external carotid artery Anterior tympanic artery and middle meningeal artery Nerve supply Nerve to medial pterygoid branch of mandibular division of trigeminal nerve Facial nerve Nerve related with ganglia Nerve to medial pterygoid passes through otic ganglia None Functions It tenses the tympanic membrane and push the base of stapes more tightly into the fenestra vestibule Draws the stapes later...

1.       Difference between malleus , Incus and Stapes Topics Malleus Incus Stapes Shape like  mallet   like premolar tooth (like anvil)  it looks like stirrup Length Longest, about 8-9 mm Medium Shortest Parts Head:  Neck:  Handle: Anterior process:  Lateral process:  Body Short process :  Long process :  Head : Neck : Anterior &  posterior limbs Base or foot- plate :  Development 1 st  pharyngeal arch 1 st  pharyngeal arch 2 nd  pharyngeal arch Cartilage Develops from dorsal end of Meckel’s cartilage   Develops from dorsal extremity of Meckel’s cartilage Develops from hyoid arch cartilage Muscle attachment Tensor tympa...