Rooster skeleton

Rooster Skeleton : The rooster skeleton can be divided into two parts: axial and appendicular. The axial skeleton comprises the skull, the spinal column, the ribs and the sternum. The appendicular comprises the limb bones which are conveniently modified to suit their peculiar physiological requirements during locomotion.

Summary

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  • 1 Axil skeleton
  • 2 Rooster Vertebral Column
  • 3 The Rooster’s appendicular skeleton
  • 4 Digestive System
  • 5 Respiratory organs
  • 6 Urinary Organs
  • 7 Male Genitalia
  • 8 Female Genitalia
  • 9 Source

Axil skeleton

The skull of the roosterIt has two large orbits separated by a thin septum formed by the sphenoid and ethmoid bones. Behind the orbits is the rounded skull whose cavity encloses the brain and its covers. The cranial group of bones is identical in the rooster, in terms of the name and number of mammals, with the exception of the interparietal bones, which are missing in the rooster. The bones of the skull lose their identity very soon after the chicks have broken the shell, as the sutures ossify and the bones fuse together. The cranial wall is relatively thick, reducing the size of the cavity, which is the external acoustic opening that opens in the middle ear in the macerated skull. The bones of the face form an acute cone made up of the same bones as in the constituted mammals. The jaws are thin, rod-shaped bones with a thin platinum process, which enters the formation of the side of the face and also the hard palate. The premaxillae form the skeleton of the upper portion of the beak and fuse before hatching the chicken to form a solid bone and form the anterior boundary of the external holes of the nasal cavity. The nasal bones are located in front of the frontal bones and form most of the roof of the nasal cavity. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. It enters the formation of the side of the face and also of the hard palate. The premaxillae form the skeleton of the upper portion of the beak and fuse before hatching the chicken to form a solid bone and form the anterior boundary of the external holes of the nasal cavity. The nasal bones are located in front of the frontal bones and form most of the roof of the nasal cavity. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. that enters the formation of the side of the face and also of the hard palate. The premaxillae form the skeleton of the upper portion of the beak and fuse before hatching the chicken to form a solid bone and form the anterior limit of the external holes of the nasal cavity. The nasal bones are located in front of the frontal bones and form most of the roof of the nasal cavity. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. The premaxillae form the skeleton of the upper portion of the beak and fuse before hatching the chicken to form a solid bone and form the anterior boundary of the external holes of the nasal cavity. The nasal bones are located in front of the frontal bones and form most of the roof of the nasal cavity. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. The premaxillae form the skeleton of the upper portion of the beak and fuse before hatching the chicken to form a solid bone and form the anterior boundary of the external holes of the nasal cavity. The nasal bones are located in front of the frontal bones and form most of the roof of the nasal cavity. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet. The lacrimal bones are part of the orbit and join the frontal and nasal bones, they are very small and end centrally, forming an acute process. The jaw is the largest bone in the face, articulating behind with the square bone by means of a concave articular facet.

Rooster Vertebral Column

The rooster’s vertebral formula is C14T7L-S14Cy0. The fourteen cervical vertebrae form the skeleton of the neck, which is a long, double-curved formation. The atlas the first cervical vertebra is a ring-shaped bone, its articular surface is deeply concave and articulates with the sole condyle of the occipital. The axis of the second cervical vertebra articulates in front with the atlas by means of three facets, and its odontoid process extends forward to articulate with the occipital condyle. The remaining cervical vertebrae consist of a shank-shaped body, an arch, and the process.

The Rooster’s appendicular skeleton

The thoracic wing member consists of the shoulder girdle, arm, forearm and hand; This is subdivided into carpus, metacarpus and fingers. The skeleton of the shoulder girdle consists of the scapula, coracoid, and clavicle. The shoulder blade or lamina is located on the dorsal wall of the chest almost parallel to the vertebrae and reaches near the ilium. The clavicle is a thin, rod-shaped bone. The humerus is the arm bone, it is a long, curved bone that is kept almost horizontally and parallel to the thoracic vertebrae.

The rooster carpus consists of two bones, the radial and the ulnar, which represent the proximal row of mammals. The fingers are three in number (first, second and third), the first has two phalanges, while the third has only one phalanx. The pelvic limb consists of four main segments: pelvic girdle, thigh, leg, and foot. The foot is subdivided into tarsus, metatarsus and toes.

Digestive system

The rooster’s digestive tract differs considerably from that of mammals. The rooster’s mouth is characterized by the absence of lips and cheeks, the jaws are covered by the beak, dense cornea formation that adapts to the shape of the jaw bones, the rooster lacks teeth. The tongue is narrow and triangular in outline, the portion is free and pointed. The hard palate is narrow and triangular in outline adapted to the shape of the beak. The mandibular glands that are between the two halves of the mandible form numerous groups; its ducts open into the floor of the mouth through numerous very small holes. The pharynx has a middle cleft that is the common hole for the Eustachian tubes. The stomach consists of a glandular or proventricular portion and the muscular or gizzard portion. The rooster’s small intestine consists of the duodenum, jejunum, and ileum. The duodenum leaves the gizzard, heads back and to the right and forms a loop, the flexure of which corresponds to the back of the abdominal cavity.

Respiratory organs

The noses are two narrow oval holes located at the base of the upper part of the bill, with an integument fold that forms its upper edge. The nasal cavities are very short and narrow and are separated by a complete septum, which is partly cartilaginous and partly bony. The trachea is a long tube, whose cartilage rings are complete, it is lined with a ciliated cylindrical epithelium that has numerous small sacral glands. Airbags are thin-walled sacs lined with a mucous membrane and covered externally with a serous membrane.

Urinary Organs

The kidneys are located along each side of the spine from the vertebral extremity of the sixth rib to far back in the iliac fossa, each consisting of three or four lobes, they are very friable and their color is dark red . The ureters originate from the anterior part of the ventral surface of the kidneys and continue parallel to the long axis of the body. The adrenals are small bodies, approximately the shape and size of a pea, and are applied against the medial portion of the anterior pole of the kidney.

Male Genitalia

The testes are centrally applied to the anterior lobes of the kidneys. The right is against the dorsal portion of the right lobe of the liver, and the left is related to the glandular portion of the stomach and intestine. They are shaped like beans, their color is pale yellow and their size varies according to the corpulence of the animal and the season of the year.

Female Genitalia

There are two ovaries in the embryo, but the right one always disappears. The left ovary is located in the dorsal part of the abdominal cavity, fixed to the dorsal wall, and it is mostly in front of the last two ribs and the last intercostal space. It is in contact above and in front of the posterior limb of the left lung.

 

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