Table of Contents
What are the joints of the thorax?
Joints and Ligaments of the Thorax
| Joint or ligament | Description |
|---|---|
| costal cartilage | the cartilage that caps the medial end of the rib |
| radiate sternocostal ligaments | ligaments that reinforce the sternocostal joint capsule |
| sternal angle | the angle formed by the articulation between the manubrium and the body of the sternum |
How many joints are in the thorax?
There are 3 types of joints present in the thoracic spine: Between vertebral bodies – adjacent vertebral bodies are joined by intervertebral discs, made of fibrocartilage.
What are the 4 parts of the thoracic cage?
1 – Thoracic Cage: The thoracic cage is formed by the (a) sternum and (b) 12 pairs of ribs with their costal cartilages. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process. The ribs are classified as true ribs (1–7) and false ribs (8–12).
What parts make up the thorax?
The bony framework of the human thorax consists of the 12 thoracic vertebrae, 12 pairs of ribs, and the sternum (breastbone).
What type of joints are the ribs?
The costochondral joints are the joints between the ribs and costal cartilage in the front of the rib cage. They are hyaline cartilaginous joints (i.e. synchondrosis or primary cartilagenous joint). Each rib has a depression shaped like a cup that the costal cartilage articulates with.
How many joints are in the rib cage?
A typical human thoracic cage consists of 12 pairs of ribs and the adjoining costal cartilages, the sternum (along with the manubrium and xiphoid process), and the 12 thoracic vertebrae articulating with the ribs.
Which are synovial joints of the thorax?
The synovial joints of thorax are :
- Costovertebral joints.
- Sternocostal joints.
- Costochondral joints.
- Interchondral joints.
How many types of thorax are there?
The thoracic cavity itself can be divided into three distinct regions, which are the mediastinum and the left and right pleural cavities.
How many bones are there in thoracic cage?
The thoracic cage is formed by the 12 pairs of ribs with their costal cartilages and the sternum. The ribs are attached posteriorly to the 12 thoracic vertebrae and most are anchored anteriorly either directly or indirectly to the sternum. The thoracic cage functions to protect the heart and lungs.
How many joints do ribs have?
A typical rib articulates with the vertebral column at two joints: (1) the joints of the heads of the ribs and (2) the costotransverse joints. Typically, the head of a rib articulates with the sides of the bodies of two thoracic vertebrae, and the tubercle articulates with the tip of a transverse process.
How many joints are in the sternum?
The joints of the sternum are between its parts. There are two articulations: the manubriosternal (sternomanubrial) and xiphisternal (xiphosternal) joints.
What type of joint is the ribs?
Sternocostal joints
| Type | Sternochondral joint 1: Primary cartilaginous joint (synchondrosis) Sternochondral joints 2-7: Synovial planar joints, nonaxial, uniplanar |
|---|---|
| Articular surfaces | Sternal ends of costal cartilages of the true ribs, costal notches on sternum |
What type of joint is the Costochondral joint?
primary cartilaginous joints
The costochondral joints are joints of the thoracic wall that connect the sternal ends of the ribs and their respective costal cartilages. They are structurally classified as primary cartilaginous joints (synchondrosis) in which bones are joined by hyaline cartilage.
How many bones are in the thoracic cage?
A typical human rib cage consists of 24 ribs, the sternum (with xiphoid process), costal cartilages, and the 12 thoracic vertebrae. It, along with the skin and associated fascia and muscles, makes up the thoracic wall and provides attachments for the muscles of the neck, thorax, upper abdomen, and back.
How many bones are in bony thorax?
The bony thorax is formed by the sternum, 12 pairs of ribs, and 12 thoracic vertebrae.
Where is the Costochondral joint?
ribs
What is name of joint between ribs and sternum?
Answer: Joint between ribs and sternum is a cartilaginous joint. Cartilaginous joints, also known as symphysis or synchondrosis joints, are partially movable joints.
What type of joint is the first rib?
synchondrosis joint
The sternocostal joints, also known as sternochondral joints or costosternal articulations, are synovial plane joints of the costal cartilages of the true ribs with the sternum. The only exception is the first rib, which has a synchondrosis joint since the cartilage is directly united with the sternum.
How many costochondral joints are there?
There are ten pairs of costochondral joints between ribs 1-10 and their respective costal cartilages. These joints are immobile and are therefore functionally classified as synarthroses. This article will cover the anatomy and function of the costochondral joints.
What type of joint is symphysis?
cartilaginous joint
Symphysis. A cartilaginous joint where the bones are joined by fibrocartilage is called a symphysis (“growing together”).
What are the parts of the thorax?
The thorax itself can be split up into various areas that contain important structures. The thorax is bound by bony structures including the 12 pairs of ribs and thoracic vertebrae, whilst also being supported by many ligaments and muscles.
How many vertebrae are there in the thorax?
The thorax is bound by bony structures including the 12 pairs of ribs and thoracic vertebrae, whilst also being supported by many ligaments and muscles.
What is the function of the muscles of the thorax?
The muscles of the thorax are also important for the vital actions of breathing and muscles that attach to the thoracic wall may also contribute to the general movement of the trunk, upper limbs and the neck.
What are the major veins of the thorax?
In terms of venous drainage, the major veins of the thorax are the: superior vena cava, azygos venous system, accessory hemiazygos vein, pulmonary veins, esophageal veins, internal thoracic veins, cardiac veins, and superior intercostal veins.