Heart & Mediastinum Flashcards
What makes up the inferior boundary of the mediastinum?
Diaphragm
What makes up the anterior boundary of the mediastinum?
Sternum and costal cartilages
What makes up the posterior boundary of the mediastinum?
Thoarcic vertebrae
What makes up the lateral boundary of the mediastinum?
Pleura
What structures are found in the superior part of the mediastinum?
Vessels of the heart
Thoracic duct
Azygous system
Vagust nerves
Pulmonary, esophageal, cardiac & autonomic nerve plexuses
Thymus
Parts of trachea and esophagus
What is found in the inferior anterior art of the mediastinum?
Fat
Lymph tissue
Vessels
Thymus
What is found in the inferior middle part of the mediastinum?
The heart and its pericardial tissues
What is found in the inferior posterior part of the mediastinum?
Thoracic aorta
Esophagus
Pulmonary arteries and veins
Azygous system
Thoracic duct
Sympathetic trunk and thoracic splanchnic nerves
What are some arteries that are found in the mediastinum?
Brachioccephalic trunk
Left common carotid artery
Left subclavian artery
What are some nerves that are found in the mediastinum?
Phrenic nerve
Vagus nerve
Left recurrent laryngeal nerve
Sympathetic trunk
The thoracic sympathetic trunk is bilateral. It is continuous with ___ and ___ parts of the sympathetic trunk.
The thoracic sympathetic trunk is bilateral. It is continuous with cervical and lateral parts of the sympathetic trunk.
What type of ganglia run rlong the course of the mediastinum?
Paravertebral ganglia.
What is the mediastinum lateral to?
Vertebral bodies
What do the thoracic splanchnic nerves emerge from?
Thoracic sympathetic trunks.
What do the greater, lesser and least thoracic splanchnic nerves provide sympathetic innervation to?
Viscera inferior to the diaphragm.
The thoracic splanchnic fibers are all presynaptic fibers. What do they synapse with?
Prevertebral ganglia in the abdomen.
The arch of aorta, left main bronchus and the diraphragm are all areas of ______ where swallowed foreign objects are most likely to lodge and where a stricture may develop (e.g. After drinking a caustic liquid).
Constriction
Arteries carry blood ___ from the heart
Away
Veins carry blood ____ the heart
To the heart
Arteries carry blood ____ in oxygen (except for the pulmonary arteries).
High
Veins carry blood ____ in oxygen (except for the pulmonary veins).
Low
What are arteries and veins entering and leaving the heart called?
Great vessels.
Backflow of blood is prevented by what structures found within the heart?
Valves
What are the functions of the two independent, side-by-side pumps found in the heart?
One directs blood to the lungs for gas exchange.
The other directs blood to body tissues for nutrient delivery.