What organs are protected by the axial skeleton

what organs are protected by the axial skeleton

Axial skeleton: functions, bones, joints

What organ is protected by bones of the axial skeleton? a. the heart b. the muscles of legs c. the reproductive organs d. the small intestines. Jul 17,  · The axial skeleton provides support and protection for the brain, spinal cord, and the organs in the ventral body cavity; it also provides a surface for the attachment of muscles, directs respiratory movements, and stabilizes portions of the appendicular skeleton. The bones of the skull are divided into cranial bones and facial bones; their main roles consist of supporting the structures of the .

The axial skeleton forms the central axis of the human body and consists of the thhe, vertebral column, and thoracic cage. The axial skeleton forms the central axis of the human body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage ribcage.

The function of the axial skeleton is to provide support and protection for the brain, spinal cord, and organs in the ventral body cavity. It also provides a surface for the attachment of muscles that move the head, neck, and trunk; gy respiratory movements; and stabilizes parts of the appendicular skeleton, which will be discussed later. The bones of the skull support the structures of the face and protect the brain.

The skull consists of 22 bones, which are divided into two categories: cranial bones and facial bones. The cranial bones are eight bones that form the cranial cavity, which encloses the brain and serves as an attachment site for the muscles of the head and neck. The eight cranial bones include the frontal bone, two parietal bones, two temporal bones, the occipital bone, the sphenoid bone, and the ethmoid bone. Fourteen facial bones form the face, provide cavities for the sense organs eyes, mouth, and nose protectec, protect the entrances to the digestive and respiratory tracts, and serve as attachment points for facial muscles.

The 14 facial bones are the nasal bones, maxillary bones, zygomatic bones, palatine, vomer, lacrimal bones, inferior nasal conchae, and mandible. The auditory ossicles of the middle ear transmit sounds from the air as vibrations to ar fluid-filled cochlea.

The auditory ossicles consist of six bones: two malleus bones, two incus bones, and two stapes, one of each on each side. These bones how to find out rar file password unique to mammals. The hyoid bone lies below the mandible in the front of the neck. It fhe as a movable base for the tongue and is connected to muscles of the jaw, larynx, and tongue.

The mandible articulates with the base of the skull, controling the opening to the airway and gut. In animals with teeth, the mandible brings the surfaces of the teeth in contact with the maxillary teeth. The vertebral column, or spinal column, surrounds and protects the protectec cord, supports the head, and acts as whah attachment point for the ribs and muscles of the back and neck. The adult vertebral column is comprised of 26 bones: the 24 vertebrae, the sacrum, and the coccyx bones.

In the adult, the sacrum is typically composed of five vertebrae that fuse into one. Aer begin life with approximately 33 vertebrae, but as we grow, several vertebrae fuse together. The adult vertebrae are further divided into the 7 cervical vertebrae, 12 thoracic vertebrae, and 5 lumbar vertebrae.

Xaial vertebral body has a large hole in the center what is nail polish thinner made of which the nerves of the spinal cord pass. There is also a notch on each side through which the spinal nerves, which serve the body at that level, can exit from the spinal cord.

The names of the spinal curves correspond to the region of the spine in which axiao occur. The thoracic and sacral curves are concave, while the cervical and lumbar curves are convex. The arched curvature of the vertebral column increases its strength and flexibility, allowing it to absorb shocks like a spring. Intervertebral discs composed of fibrous cartilage lie between adjacent vertebral bodies from the second cervical vertebra to the sacrum. Each disc is part of a joint that allows for some movement of the spine, acting as a cushion to absorb shocks from movements, such as walking and running.

Intervertebral discs also act as ligaments to bind vertebrae together. The inner part of discs, the nucleus pulposus, hardens as people age, becoming less elastic. This loss of elasticity diminishes its ability to absorb shocks. The thoracic cage, also known as the ribcage, is the skeleton of the chest.

It consists of the ribs, sternum, thoracic vertebrae, and costal cartilages. The thoracic cage encloses and protects ars organs of the thoracic cavity, including the heart and lungs.

It also provides support how to become a softball coach for high school the shoulder girdles and upper limbs, whwt serves as the attachment point for the diaphragm, muscles of the back, chest, neck, and shoulders.

Changes in the volume of the thorax enable breathing. The sternum, or breastbone, is a long, flat bone located at the anterior of the chest. It is formed from three bones that fuse in the adult. The ribs are 12 pairs of long, curved bones that attach to the thoracic vertebrae and krgans toward the front of the body, forming rogans ribcage.

Costal cartilages connect the anterior ends of the ribs to the sternum, with the exception of rib pairs 11 and 12, which are free-floating ribs.

Learning Objectives Describe the bones orgabs function of the human axial skeleton. Key Points Protectes axial skeleton provides support and protection for the brain, spinal cord, and the organs in the ventral body cavity; it also provides a surface for the attachment of muscles, directs respiratory movements, and stabilizes portions of the appendicular skeleton. The bones of the skull are divided into cranial bones and facial bones; their main roles consist how to create account in itunes supporting the structures of the face and protecting the brain.

The vertebral column protects the spinal cord, supports the head, and acts as an attachment point for the ribs and muscles of the back and neck. Key What organs are protected by the axial skeleton intervertebral disc : a disc between the vertebra in the spine ossicle : a small bone or bony structureespecially one of the three of the middle ear convex : curved or bowed outward like the outside of a bowl, sphere or circle vertebral column : the series of vertebrae that protect the spinal cord; the spinal column concave : curved or bowed inward like the inner surface of a sphere or bowl.

Human Axial Skeleton The axial skeleton forms the central yb of the human body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the protectdd column, and the thoracic cage ribcage.

The Skull The bones of the skull support the structures of the face and protect the brain. The cranial orggans, including the frontal, parietal, temporal, occipital, ethmoid, and sphenoid bones. The Vertebral Column The vertebral column, or spinal column, surrounds and protectwd the spinal cord, supports the head, and acts as an attachment point for the ribs and muscles of the back and neck.

The Thoracic Cage The thoracic cage, also known as the ribcage, is pfotected skeleton of protecetd chest.

1. Skull Bones Protect the Brain and Form an Entrance to the Body.

The axial skeleton is a fundamental part of the human skeleton since the protection and support of the different internal organ systems depend on it: the nervous system, the digestive system, the cardiovascular system, the respiratory system and part of the muscular system. The axial skeleton forms the central axis of the body and includes the bones of the skull, ossicles of the middle ear, hyoid bone of the throat, vertebral column, and the thoracic cage (ribcage) (Figure 1). The function of the axial skeleton is to provide support and protection for the brain, the spinal cord, and the organs in the ventral body cavity. Jul 04,  · Axial Skeleton: Functions and Anatomy. Axial Skeleton. These bones make up the axial skeleton. The head bone's connected to the neck bone, the neck bone's connected to the backbone and, Axial Skeleton: Skull and Facial Bones. Axial Skeleton: Vertebrae.

The bones of the human skeleton are divided into two groups. The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage.

The skull consists of the cranial bones and the facial skeleton. The cranial bones compose the top and back of the skull and enclose the brain. The facial skeleton, as its name suggests, makes up the face of the skull. The 14 bones of the facial skeleton form the entrances to the respiratory and digestive tracts. The facial skeleton is formed by the mandible, maxillae r,l , zygomatics r,l , and the bones that give shape to the nasal cavity: lacrimals r,l , nasals r,l , vomer, palatines r,l , and the nasal conchae r,l.

The eight cranial bones support and protect the brain: occipital bone, parietal bone r,l , temporal bone r,l , frontal bone, sphenoid, and ethmoid. In fetuses and newborn infants, cranial bones are connected by flexible fibrous sutures, including large regions of fibrous membranes called fontanelles. These regions allow the skull to enlarge to accommodate the growing brain. The sphenoidal, mastoid, and posterior fontanelles close after two months, while the anterior fontanelle may exist for up to two years.

As fontanelles close, sutures develop. Skull sutures are immobile joints where cranial bones are connected with dense fibrous tissue. Inside the petrous part of the temporal bone are the three smallest bones of the body: the malleus, incus, and stapes.

These three bones articulate with each other and transfer vibrations from the tympanic membrane to the inner ear. The laryngeal skeleton , also known as the larynx or voice box, is composed of nine cartilages. It is located between the trachea and the root of the tongue. The hyoid bone provides an anchor point. The movements of the laryngeal skeleton both open and close the glottis and regulate the degree of tension of the vocal folds, which—when air is forced through them—produce vocal sounds.

The vertebral column is a flexible column formed by a series of 24 vertebrae, plus the sacrum and coccyx. Commonly referred to as the spine, the vertebral column extends from the base of the skull to the pelvis. The spinal cord passes from the foramen magnum of the skull through the vertebral canal within the vertebral column. The vertebral column is grouped into five regions: the cervical spine CC07 , the thoracic spine T T , the lumbar spine LL05 , the sacral spine, and the coccygeal spine.

The thoracic cage , formed by the ribs and sternum, protects internal organs and gives attachment to muscles involved in respiration and upper limb movement. The sternum consists of the manubrium, body of the sternum, and xiphoid process. Ribs are called true ribs because they articulate directly to the sternum, and ribs are known as false ribs. Download Axial Skeleton Lab Manual.

See more from our free eBook library. Ancient jaw may hold clues to origin of human genus from Science News. Human Anatomy Atlas offers thousands of models to help understand and communicate how the human body looks and works. Moody, Sally A. Principles of Developmental Genetics. Waltham: Elsevier Inc. An Overview of the Skeletal System. Appendicular Skeleton.

Joints and Ligaments. Skeletal System Pathologies. When you select "Subscribe" you will start receiving our email newsletter. Use the links at the bottom of any email to manage the type of emails you receive or to unsubscribe. See our privacy policy for additional details. Learn Site. Facial Skeleton The 14 bones of the facial skeleton form the entrances to the respiratory and digestive tracts.

Cranial Bones The eight cranial bones support and protect the brain: occipital bone, parietal bone r,l , temporal bone r,l , frontal bone, sphenoid, and ethmoid. Skull Sutures In fetuses and newborn infants, cranial bones are connected by flexible fibrous sutures, including large regions of fibrous membranes called fontanelles. The four major cranial sutures are: lambdoid suture between the occipital and parietal bones coronal suture between the frontal and parietal bones sagittal suture between the two parietal bones squamous sutures between the temporal and parietal bones 2.

Laryngeal Skeleton The laryngeal skeleton , also known as the larynx or voice box, is composed of nine cartilages. The Bones of the Vertebral Column: The Vertebrae, Sacrum, and Coccyx The vertebral column is a flexible column formed by a series of 24 vertebrae, plus the sacrum and coccyx. The Bones of the Thoracic Cage Protect Internal Organs The thoracic cage , formed by the ribs and sternum, protects internal organs and gives attachment to muscles involved in respiration and upper limb movement.

External Sources Ancient jaw may hold clues to origin of human genus from Science News. Get our awesome anatomy emails! About News Contact. All Rights Reserved. User Agreement Privacy Permissions.

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