Online Digital Library
www.bioscience.pk
Free Downloads Medical Books.
SiteGround
www.siteground.com
Web Hosting Services Crafted with Care!

COMPARATIVE ANATOMY: PELVIC GIRDLE OF FROG AND SHARK

Written by 
Published in Zoology
Monday, 10 July 2017 19:18
Rate this item
(1 Vote)
PELVIC GIRDLE OF FISH PELVIC GIRDLE OF FISH
The hip or pelvic girdle' is present in the posterior side of the body to which the pelvic fins or hind limbs are attached. The pelvic girdle is connected directly to the vertebral column in the sacral region. The pelvic girdle has two equal halves which are known as 'ossa innominata'. Each as innominatum is formed by three bones. They are the dorsal bone ilium, the ventral bone-ischium and the antero-ventral bone pubis. The pelvic girdle has a depression at the junction of the three bones. It is termed as acetabulum into which the head femur of the hind limb articulates and forms a ball and socket joint.
 
frog pelvic girdle15
 
In the different vertebrates, the same bones are present in the pelvic girdle with some modifications.
 
 
Shark (Scoliodon) Frog (Rana)
1. The pelvic girdle is formed with cartilage tissues. 1. The pelvic girdle is formed chiefly with bone tissues.
2. It is embeded in the body wall muscles infront of the cloacal aperture. 2. It is present at the hind end of the trunk.
3. It is a simple transverse bar known as ischio - pubis bar. 3. It consists of two similar halves which are separated infront and fused behind to form a median vertical disc.
4. Each half of the girdle is formed by the fusion of ilium ischium and pubis. 4. Each half of the girdle consists of three bones - ilium, isclium and pubis.
5. Acetabulum is absent. 5. Each side of the vertical disc bears a cup-like depression Acetabulum. The head of femur of the thigh bone articulates with the acetabulum. So all the three bones take part in the formation of the acetabulum.
6. The ilium possess an iliac process and a foramen. 6. The ilium extends forwards in the form of an arm to articulate with the transverse process of the sacral vertebra. A vertical ridge is formed along with this arm is called iliac crest.
7. Ischium and pubis fused together and form Ischio-pubis bar. 7. The ischium forms the posterior part of the disc and acetabulum. Ischium, fuses with the other side ischium and forms ischium symphysis.
8. Pubis fuses with ischium. It is not a separate bone. 8. The pubis forms the ventral part of the disc and acetabulum. It fuses with the pubis of the other half and forms pubic symphysis. It is a separate bone.
9. Pubis is formed with cartilage tissue. 9. Pubis is formed with calcified cartilage tissue.
10. The pelvic girdle is straight in the middle but bent at the ends. These are produced dorso-lat-erally into short iliac processes. 10. The pelvic girdle V-shaped associated with a vertical disc formed with the ischium & pubis bones.
11. The pelvic fins are attached directly. 11. The hind limb bones are articulating with the pelvic girdle.
12. The pelvic girdle provides attachment to the claspers through the muscles of male. 12. Such arrangement is absent. Penis is absent.

Useful Sites

  • NCBI

    National Center for Biotechnology Information
  • LTO

    Lab Tests Online® by AACC
  • ASCP

    American Society for Clinical Pathology
  • ASM

    American Society for Microbiology
  • The Medical Library®

    Project of BioScience.pk

Sponsored Links

Daily Science
www.bioscience.pk
The Science News app that will get you to the breaking news.
ASH Job Center
www.jobcenter.hematology.org
By American Society of Hemotology
Online Digital Library
www.bioscience.pk
Free Downloads Medical Books.
Advertisement

Sponsored Links

ASH Job Center
www.jobcenter.hematology.org
By American Society of Hemotology
SiteGround
www.siteground.com
Web Hosting Services Crafted with Care!
BioScience.pk App
www.bioscience.pk
Put vital info into the palm of your hand.
Online Digital Library
www.bioscience.pk
Free Downloads Medical Books.
Daily Science
www.bioscience.pk
The Science News app that will get you to the breaking news.
Make money online!
www.adf.ly
Use a URL shortener service that pays.

Connect With Us

Contact Us

All comments and suggestions about this web site are very welcome and a valuable source of information for us. Thanks!

Tel: +(92) 302 970 8985-6

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Website: https://www.bioscience.pk

Our Sponsors

Findeen.com

By using BioScience.pk you agree to our use of cookies to enhance your experience on this website.