THE GOAT SKELETON
COLLECTION: GOAT HANDBOOK
ORIGIN: United States
DATE INCLUDED: June 1992
Extension Goat Handbook
This material was contributed from collections at the National Agricultural
Library. However, users should direct all inquires about the contents to
authors or originating agencies.
DOCN 000000044
NO F-1
TI THE GOAT SKELETON
AU P. W. Hentschke; Roseworthy Agr. Coll., Roseworthy, South Australia
RV G. F. W. Haenlein; U. of Delaware, Newark
DE Anatomy and Physiology
Text
1 About one third of the weight of bone consists of an organic
framework of fibrous tissues and cells. This organic matter gives
resilience and toughness to bones. The remaining two-thirds of the
weight of bone consists of organic salts (largely calcium and
phosphorus) deposited within the organic framework. These salts give
hardness and rigidity to bones.
2 Classification of Bones
Long bones are greater in one dimension than the other. Long bones
function chiefly as levers and aid in support, locomotion and
prehension. The best examples of long bones are found in the limbs.
3 Short bones are somewhat cuboidal, or approximately equal in all
dimensions. Short bones function in absorbing concussion, and are found
in complex joints such as the knee or hock where a variety of
movements, as well as absorption of shock are required.
4 Flat bones are relatively thin, and expanded in two dimensions.
They function chiefly for protection of vital organs (e.g. brain, heart,
lungs, pelvic viscera), but also provide large surface area for muscle
attachment.
5 Sesamoid bones resemble a sesame seed and are developed along the
course of tendons to reduce friction or change the course of tendons.
The patella (knee-cap) is the largest sesamoid bone in the body.
6 Pneumatic bones contains air spaces that communicate with the
exterior. Found in the skull.
7 Irregular bones are unpaired bones located in the median plane,
e.g. vertebrae and sternebrae, etc. Irregular bones are important for
protection, support and muscle attachment.
8 Function of Bones
Some common functions are:
--Give rigidity and form to the body.
--Provide protection.
--Act as levers.
--Store minerals, especially calcium and phosphorous.
--Provide a site for blood formation.
9 The Skeleton
Consists of two parts:
Axial skeleton, including
--skull
--vertebral column
--sternum
--ribs
Appendicular skeleton, including
--fore-limbs
--hind-limbs
10 The Axial Skeleton
This includes almost all bones, except those of the limbs. It
consists of four parts:
Skull -- is that part of the skeleton which forms the basis of the
head. It functions in protection of the brain, supports many of the
sense organs and forms passages for the beginning of the digestive and
respiratory system. The skull is composed of a large number of bones
which are joined together by joints called sutures. The large number of
bones, and their slightly differing shapes and sizes in various
animals accounts for the difference in the shape of heads of individual
animals.
Vertebral Column -- is composed of irregular bones called
vertebrae. There are five different regions of the vertebral column:
--Cervical - neck region
--Thoracic - chest region
--Lumbar - loin region
--Sacral - pelvic region
--Coccygeal - tail region
All vertebrae consists of various parts including:
--Body
--Vertebral arch
--Vertebral foramen
--Spinous process
--Transverse process
--Articular process
11 The vertebrae in the various regions differ in the degree of
development of the various parts.
12 Cervical vertebrae generally have well-developed articular
processes to facilitate the large amount of movement normally found in
the neck region. Other processes are not as well-developed as in other
regions of the vertebral column.
13 All domestic mammals have 7 cervical vertebrae. The first (atlas),
and second (axis) cervical vertebrae differ in structure from the other
5 cervical vertebrae, and these cervical vertebrae differ from those in
other regions as shown in the diagrams.
Thoracic Vertebrae (chest region):
--Large spinous process (chest region)
--Small transverse processes
--Tiny articular processes (very little movement in the chest region)
--Facets for articulation with ribs
--Small bodies
Lumbar Vertebrae (loin region):
--Large articular process
--Small spinous process
--Medium articular processes
--Medium length of body
Sacral Vertebrae (Sacrum) (pelvic region):
--Individual vertebrae fused to form one bone
--Transverse processes well developed at the
front end
--Spinous process small
14 Coccygeal Vertebrae (tail region): The vertebrae of the tail change
shape. The further along the tail, the less distinct do the various
processes become. The last few coccygeal vertebrae do not have a
spinal process, and the vertebral arch is not closed.
15 Sternum -- forms the base of the chest cavity (thorax). The sternum
consists of small bone segments, called sternebrae, which tend to fuse
together as age advances. The goat has 7 sternebrae.
16 Ribs -- form the lateral walls of the chest cavity (thorax).
Usually the number of pairs of ribs equals the number of thoracic
vertebrae, e.g. goat has 13 thoracic vertebrae and 26 ribs usually.
Each rib consists of several parts:
--Head
--Tubercle
--Body
--Costo-chondral junction
--Costal cartilage
17 The costo-chondral junction and costal cartilage may not be present
in floating ribs.
18 The shape of the individual ribs changes from the front of the
rib-cage to the back. The first pair of ribs are short, straight and
thick. As we move along the rib-cage, the ribs initially lengthen and
become more curved. As we move further along, the ribs become shorter,
but the curvature continues to increase.
19 Sternal ribs -- the number of pairs of sternal ribs equals the
number of vertebrae. Sternal ribs extend from their respective thoracic
vertebrae to the sternum, where they are connected directly by costal
cartilages.
20 Asternal ribs -- do not connect directly with the sternum. The
costal cartilage of asternal ribs joins to form the costal arch, then
attaches the ribs indirectly to the sternum.
21 Floating ribs -- sometimes the last one or two ribs have no
connection with other ribs via the costal arch. These are floating
ribs. Not usually present in goats.
22 The Appendicular Skeleton
The appendicular skeleton is made up of the bones of the limbs.
23 The bones of the front limb are compared to those of the hind limb:
Front Limb Scapula Humerus Radius
Ulna Carpus (knee) Metacarpus (cannon)
Phalanges (digits)
Hind Limb
Pelvis (ilium, ischium, pubis)
Femur
Tibia
Fibula
Tarsus (stock) (hock)
Metatarsus (cannon)
Phalanges (digits)
24 The following diagrams show these bones and the various joints
formed by the front and hind limbs.
25 The outline of the goat, or its basic conformation, relates to its
bone-framework, or skeleton. The stature of an animal, it's body
capacity, legs, feet, etc. are directly associated with the skeleton.
A sound knowledge of these anatomical basics is a must to the breeder,
who takes interest in an animal's conformation, and tends to breed a
more productive animal.
26 Adopted from Dairy Goat Journal, April 1980, 27-29.
VIDF 134,135
תתתתתתתתתתתתתתתתתתתתThe National Dairy Database (1992)תתתתתתתתתתתתתתתתתתתת
תתתתתתתתתתתתתתתתתתתתתתתתתתתת\NDB\GOAT\TEXT2\F1תתתתתתתתתתתתתתתתתתתתתתתתתתתת
%f TITLE;THE GOAT SKELETON
%f COLLECTION;GOAT HANDBOOK
%f ORIGIN;United States
%f DATE_INCLUDED;June 1992