What are the parts of thoracic?
[2] The thoracic cavity contains organs and tissues that function in the respiratory (lungs, bronchi, trachea, pleura), cardiovascular (heart, pericardium, great vessels, lymphatics), nervous (vagus nerve, sympathetic chain, phrenic nerve, recurrent laryngeal nerve), immune (thymus) and digestive (esophagus) systems.
What are the three main parts of the thoracic cage?
It consists of three parts: the manubrium, body, and xiphoid process. The manubrium is the wider, superior portion of the sternum.
Which of the following is a part of the thoracic cage?
The thoracic cage consists of the rib cage, the 12 thoracic vertebrae, 12 pairs of ribs (along with their associated costal cartilages) and the sternum.
How many thoracic cage are there?
The thoracic cage, also known as the rib cage, is the osteocartilaginous structure that encloses the thorax. It is formed by the 12 thoracic vertebrae, 12 pairs of ribs and associated costal cartilages and the sternum.
What makes up the thoracic wall?
The thoracic wall consists of a bony framework that is held together by twelve thoracic vertebrae posteriorly which give rise to ribs that encircle the lateral and anterior thoracic cavity. The first nine ribs curve around the lateral thoracic wall and connect to the manubrium and sternum.
What are the layers of the thoracic wall?
The thoracic wall is made up of five muscles: the external intercostal muscles, internal intercostal muscles, innermost intercostal muscles, subcostalis, and transversus thoracis.
What are the functions of the thoracic rib cage?
The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities. During inspiration the ribs are elevated, and during expiration the ribs are depressed.
How thoracic cage is formed?
Rib cage is the bony structure forming the boundaries for the thorax, which is also called as thoracic cage. It is made up of thoracic vertebra posteriorly, sternum anteriorly and ribs connecting the two structures passing laterally.
Is clavicle part of thoracic cage?
The thoracic cage is comprised of all thoracic vertebrae, the ribs, and the sternum, and also connects with the clavicle (collar bone), and the scapula (shoulder blade).
What are ribs 11 and 12 called?
The first seven ribs, referred to as true ribs, each attach to the sternum with a piece of cartilage. The next five ribs (8-12) are called false ribs, with ribs 8-10 attaching by cartilage to the sternum via a com- mon costal cartilage. Ribs 11 and 12 are free at the anterior border and are called floating ribs.
Why are 8/12 ribs called false ribs?
Rib pairs 8-12 are considered false ribs because they only attach to the sternum by attaching their combined costal cartilages with the costal cartilage of the 7th rib.
What is the shape of the thoracic cage?
The thoracic cage, a flexible framework of bones and cartilage, is conical in shape. It is narrower at the top and broadens to fit and protect some critical organs of respiration and circulation—that is, the lungs and heart. The thoracic cage gives your upper torso structure.
What are the 3 things in the thoracic cage quizlet?
The sternum, the thoracic vertebrae and their intervertebral discs, and the ribs and costal cartilages.
What are the functions of the thoracic rib cage?
The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities. During inspiration the ribs are elevated, and during expiration the ribs are depressed.
What are the functions of the bones of the thorax?
The major function of the thorax bones is to form the thoracic cavity that encloses and protects the most important organs of the circulatory and respiratory systems, the heart and lungs.
How many bones are in the thoracic vertebrae?
12 vertebraeYour thoracic spine consists of 12 vertebrae, labeled T1 through T12. Vertebrae are the 33 individual, interlocking bones that form your spinal column. These bones help protect your spinal cord from injury while allowing you to twist and turn.
What is the thoracic cage?
The thoracic cage (rib cage) forms the thorax (chest) portion of the body. It consists of the 12 pairs of ribs with their costal cartilages and the sternum ( Figure 7.32 ). The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1–T12). The thoracic cage protects the heart and lungs.
What is the elongated bony structure that anchors the anterior thoracic cage?
Sternum. The sternum is the elongated bony structure that anchors the anterior thoracic cage. It consists of three parts: the manubrium, body, and xiphoid process. The manubrium is the wider, superior portion of the sternum. The top of the manubrium has a shallow, U-shaped border called the jugular (suprasternal) notch.
What is the name of the ribs that attach to the cartilage of the next rib?
For ribs 8–10, the costal cartilages are attached to the cartilage of the next higher rib. Thus, the cartilage of rib 10 attaches to the cartilage of rib 9, rib 9 then attaches to rib 8, and rib 8 is attached to rib 7. The last two false ribs (11–12) are also called floating ribs (vertebral ribs).
What are the ribs attached to?
Most ribs are then attached, either directly or indirectly, to the sternum via their costal cartilage (see Figure 7.32 ). The ribs are classified into three groups based on their relationship to the sternum. Ribs 1–7 are classified as true ribs (vertebrosternal ribs).
What are the ribs of the sternum?
The sternum consists of the manubrium, body, and xiphoid process. The ribs are classified as true ribs (1–7) and false ribs (8–12). The last two pairs of false ribs are also known as floating ribs (11–12).
How many pairs of ribs are there?
The ribs articulate posteriorly with the T1–T12 thoracic vertebrae, and most attach anteriorly via their costal cartilages to the sternum. There are 12 pairs of ribs. The ribs are numbered 1–12 in accordance with the thoracic vertebrae.
What is the remainder of the rib?
The remainder of the rib is the body of the rib (shaft). Just lateral to the tubercle is the angle of the rib, the point at which the rib has its greatest degree of curvature. The angles of the ribs form the most posterior extent of the thoracic cage. In the anatomical position, the angles align with the medial border of the scapula.
