University:
Kentucky State University
Course:
BIO 301 | Human Anatomy
Academic year:

2019
Views:

198

Pages:

17
Author:

slypery5hy

Thorax cavity Spring 2019 Thoracic cavity  Extends between the thoracic inlet and the thoracic outlet.  Enclosed by the thoracic wall. Thoracic inlet Thoracic outlet Spring 2019 At root of the neck. close by the diaphragm. 2 Thoracic cavity Borders:     Ant. Sternum. Post. 12 vertebrae. Lateral curving ribs, costal cartilages. Their coverings and linings. Spring 2019 3 Thoracic cavity Divided into 3 major compartments:  Two Peripheral pleural sacs, right and left, each enclosing a lung.  One Central, Mediastinum. Spring 2019 Cross section in the thorax 4 Spring 2019 5 Pleura  Thin continuous serous membrane that covers the lungs and lines thoracic wall. Parts:  Visceral, cover the lungs.  Parietal, line wall of thoracic cavity. Parts: 1-4  Pleural cavity: • • • Potential space between parietal and visceral pleura. That contains pleural fluid that act to lubricate and facilitate breathing. Come to be true in diseases. Spring 2019 6 Spring 2019 7 Plural effusion Spring 2019 8 Trachea  About 11.25 cm long.  Pass within neck and thorax.  Extends from C6 to sternal angle (disc between T4/T5).  Form of about 20 C-shaped cartilaginous rings.  Defected posterior and replaced by Trachealis smooth muscle.  Lined by respiratory epithelium.  Divides into 2 bronchi. Spring 2019 9 Right 1ry bronchus     Shorter Wider Vertical than left. About 1 inch long. Therefore, inhaled foreign bodies that enter trachea are commonly trapped in it. Left primary bronchus     Narrower Longer More horizontal. About 2 inch long. Larynx Tracheal rings Right bronchus Spring 2019 Left bronchus 10 Lungs     Conical-shaped spongy organs. Lie on both sides of mediastinum. Attach to mediastinum by their root. Suspended free within its own pleural cavity. Spring 2019 11 Lungs Parts, each lung has:  Apex (at root of the neck).  Base (concave) on diaphragm.  3 borders: • Anterior (narrow & overlap the heart). • Posterior (rounded, on both sides of the vertebral column). • Inferior (narrow).  3 surfaces: • Diaphragmatic (concave), rest on the diaphragm (inferior) . • Costal wide and convex (Lateral) . • Mediastinal, related to mediastinal structures (Medial) . Spring 2019 12 Left Lung Characteristics:  Has one oblique fissure.  Has 2 lobes: • Superior lobe. • Inferior lobe.  Cardiac notch at its anterior border, notched by the heart. Spring 2019 13 Left Lung Characteristics: Since it develop in a smaller space. It is:  Longer  Narrower  Lighter  Less functional than the right.  Related to the left high pressure arterial side of the heart. Spring 2019 14 Right Lung Characteristics:  Has 2 fissures: • Oblique. • Horizontal.  Has 3 lobes: • Superior lobe. • Middle lobe. • Inferior lobe. Spring 2019 15 Right Lung Characteristics: Since it develop in a larger space. It is:  Wider.  Shorter.  Heavier.  More functional than the left.  Related to the right low pressure venous side of the heart. Spring 2019 16 Root of the Lung    Connect lung to the mediastinum. Surrounded by pleural sleeve. Contents: • 1 Main bronchus. • 1 Pulmonary artery. • 2 pulmonary veins,  Superior  Inferior • Nerves. • lymphatics.  Arterial supply: The lung tissue itself, supplies by bronchial arteries from thoracic aorta. Spring 2019 17

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