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 Male And Female Pelvis

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           Difference Male And Female Pelvis

Elements of Comparison

Male Pelvis

Female Pelvis

False pelvis

Narrow and deep

Wide and shallow

True pelvis

Narrow and deep

Roomy and shallow

Size

Male pelvis is smaller and narrower with heavier and thicker bones.

Female pelvis is bigger and wide with lighter and denser bones.  

Sacrum

Has a longer and narrower sacrum.

Has a sacrum that is wider, shorter and less curved.  

Pelvic Inlet/Brim

Has a heart-shaped pelvic inlet

Has pelvic inlet that is slightly oval in shape.  

Acetabulum

The acetabulum is larger

The acetabulum is smaller

Ilium

Ilium of male pelvis is more vertical with more curved iliac crest.

The Ilium of female pelvis is less vertical with less curved iliac crest.  

Ischial tuberosity

The ischial tuberosity is longer, close together and more laterally projecting.

The ischial tuberosity is shorter, farther apart and more medially projecting.

Pubic Arch

Has a v-shaped pubic arch

Has a pubic arch that is wider.  

Sciatic Notch

Sciatic notch is narrower

Sciatic notch is wider

Coccyx

Coccyx of a male pelvis is projected inwards (less curved anteriorly) and immovable.

Female pelvis has a flexible and straighter coccyx.

Purpose of Design

Male pelvis is designed to support a heavy body with a stronger muscle structure.

The female pelvis has been designed for purposes of childbearing and easier delivery.  

Obturator foramen

The obturator foramen is round

The obturator foramen is oval.

Pelvic Bone

Male pelvic bone is heavier, taller and much thicker

 Female pelvic bone is thinner and denser.

Pelvic outlet

Pelvic outlet in male pelvis is narrower.

Pelvis outlet in female pelvis is wider.

 

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