Skeletal system - arm bones, Biology

Assignment Help:

ARM BONES -

Each arm contain 30 bones as : humerus in upper arm, radius ulna in forearm, 8 carples in wrist, 5 metacorples in plam, 14 phalnges in fingers.

HUMERUS -

Bone of upper arm. Head of humerus is fitted in glenoid cavity of scapula.

Ball and socket joint is formed.

Head bears a pair of small tuberosities, separated by intertubercular groove.

Trochlea is fitted in sigmoid notch of radius ulna.

A deltoid ridge is present at the anterior surface of humerus.

Above the trochlea supra trochlear foraman is present through which brachial artery passes out. Present in rabbit, but absent in man.

184_humerus.png               369_humerus rabbit.png

RADIUS ULNA -

Bone of fore arm. Ulna is longer than radius.

Radius is situated at thumb side. Olecranon process & sigmoid notch present at proximal end.

363_radius ulna.png                 2238_rabbit radius ulna.png

Note :- In frog radius & ulna both are fused in complete length, so the world radioulna is used instead of radius ulna.

HAND -

In hand wrist, palm & fingers are clear. In wrist carpals bones are present.

In palm metacarpals are present. In fingers phalanges are present.

The digital formula of rabbit and man is 2 3 3 3 3 = 14.

659_hand.png               2245_rabbit hand.png

                                         MAN                                                                                      RABBIT


Related Discussions:- Skeletal system - arm bones

State the term- hue, State the term- Hue Hue  is the dominant spectral ...

State the term- Hue Hue  is the dominant spectral colour (rainbow) and is related to the wavelength of light. In Munsell system there are five principal hues; red (R), yellow (

What is venous hum in heart dieases, What is Venous Hum in heart dieases? ...

What is Venous Hum in heart dieases? Characteristic: Continues sound with diastolic component often a higher pitched and louder than the systolic, best heard just above the c

Disorders of lower respiratory tract, DISORDERS OF LOWER RESPIRATORY TRACT:...

DISORDERS OF LOWER RESPIRATORY TRACT: The lower respiratory  tract infections  tend to occur most frequently in young children who have not developed resistance  to infectious

What are the classes of lipoproteins in the blood, Q. What are the classes ...

Q. What are the classes of lipoproteins in the blood? Blood lipids (cholesterol, triglycerides and phospholipids) being insoluble in blood need a ship to travel in our body; it

Signify the glands which are located at upper end of kidney, Part of the en...

Part of the endocrine system in humans, these 2 glands are small bodies located at upper end of every kidney. While these glands perform a range of functions, two of the most signi

Life processes, why the small intestine is longer in herbivores as comparis...

why the small intestine is longer in herbivores as comparison to carnivores animals

Mycoplasmosis-contagious caprine pleuropneumonia (ccpp), Contagious caprine...

Contagious caprine pleuropneumonia (CCPP) Mycoplasma mycoides subsp. capri (Mmc) is the main causative agent of caprine pleuropneumonia, a serious malady of goats in our countr

Does thermal inversion occur in the winter or in the summer, Does thermal i...

Does thermal inversion occur in the winter or in the summer? Pollutant low altitude thermal inversion happens in the winter. In this period of the year the sun heats the soil l

What are integral membrane proteins, Membrane proteins are classify as eith...

Membrane proteins are classify as either integral (intrinsic) or peripheral (extrinsic) depending on how tightly they are linked with membrane. The Integral membrane proteins are s

How to alternately donating and accepting ions, Select all that are true or...

Select all that are true or correct regarding a buffer: alternately donating and accepting ions a set of chemicals that work together to resist pH change often a weak acid or base

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd