The Circulatory System Flashcards
is the transportation system of the body
Circulatory or Cardiovascular System
Two parts of the Circulatory System
- Pulmonary
- Systemic
Part of the circulatory system that conveys blood from the heart to the lungs and back to the heart
The pulmonary part
The part of the circulatory system that carries blood from the heart to all body tissues and cells (except some parts of the lungs and back to heart
The systemic part
The circulatory system is composed of?
- The heart
- Arteries
- Arterioles
- Capillaries
- Venules
- Veins
- Lymphatic vessels and nodes
- Reticuloendothelial tissues
is a muscular pump that propels blood either to the lungs or to other body tissues
The Heart
are distributing vessels that carry blood AWAY from the heart
The arteries
to all body tissues
Aorta
to the lungs
The pulmonary trunk
are the small final branches of the smallest arteries, and are present in all tissues that are supplied with the blood.
Arterioles
are very minute microscopic hairlike vessels that form networks between the small arterioles and the venules
What is the function of the Capilliaries
exchange of blood and tissue constituents takes place through the capillary walls
Is a colorless fluid that collects in lymphatic vesslss
Lymph
minute vessels which begin as very small vessels
Lymph capillaries
are formed by the union of capillaries that unite to form larger and larger vessels
Lymph vessels
are connected with the larger lymph vessels
Lymph nodes
The two Trunk Lymph vessels
Thoracic Duct and Right Lymph Duct
Draining whole body except the upper right
Thoracic Duct
Draining the right upper limb, right thorax, and right side of head and neck
Right Lymph Duct
form a second collecting system
The Lynphatics
Reticuloendothelial structures
Bone marrow, lymph nodes, spleen, liver and thymus gland
Structure of Blood Vessels
inner coat layer, Layer of flat cobblestone like cells that form a lining membrane with connective tissues and elastic tissue
Tunica Intima
Structures of Blood Vessels
A layer visceral muscle, the fibers encircling the vessels, with considerable elastic tissue as well
Tunica Media (Middle coat)
Structures of Blood Vessels
A layer of connective tissue outside the middle coat
Tunica adventitia (Outer Layer)
bluntly pointed end that is directed to the left anteriorly
apex
the broad end that is directed to the right, posteriorly and cranially to the right of the right sternal border
Base
lies posterior to the sternum
Sternocostal surface
rest upon the diaphragm
Diaphragmatic surface
The heart has _ coverings forming its walls, a ____, __ chambers or cavities, ___ openings and __ sets of functioning valves
- 3 coverings
- septum
- 4 chambers or cavities
- 4 sets of functioning valves
The Coverings of the Heart - The Wall
this layer forms the lining membrane of the heart
Endocardium
The Coverings of the Heart - The Wall
muscular layer of the heart and consists of a special type of muscle found only in the heart, cardiac muscle
Myocardium
The Coverings of the Heart - The Wall
thin covering and is applied to the outer surface of the muscular layer
Visceral Pericardium or epicardium
The Pericardium and Pericardial Sac
Two layers of the Serous pericardium
- Visceral layer
- Parietal layer
The Pericardium and Pericardial Sac
Outer covering of the heart in the Serous pericardium
Visceral layer
The Pericardium and Pericardial Sac
Forms the lining of a sac that encloses the heart
Parietal layer
The Pericardium and Pericardial Sac
A thick layer of fibrous connective tissue,
Surrounds the parietal pericardium to form the outer layer of the pericardial sac
Fibrous pericardium
The Pericardium and Pericardial Sac
is a bag with the heart within it, consisting of the parietal serous pericardium and the fibrous pericardium
Pericardial sac
The Pericardium and Pericardial Sac
is a potential space between the inner surface of the pericardial sac and the visceral pericardium
Pericardial cavity
The Four Chambers of Cavities of the Heart
- Left atrium
- Left ventricle
- Right atrium
- Right ventricle
The Heart
is that part of the partition between the right and left atria.
Interatrial septum
The Heart
is the partition between the right and left ventricles.
Interventricular septum
The Heart
is the opening between the left atrium and left ventricle
The left atrioventricular opening (ostium)
The Heart
is the opening between the right atrium and right ventricle.
The right atrioventricular opening (ostium)
The Heart
are two ear shaped pouches, one forming part of each atrium.
The auricles
The Heart
prominent anterior part of the right ventricle where it opens into the pulmonary trunk.
Conus arteriosus
The Heart
is a groove on the surface of the heart marking the junction of the atria and the ventricles. It completely encircles the heart.
Coronary sulcus
The Heart
anterior and posterior are the grooves where the ventricles meet each other anteriorly and posteriorly
Interventricular sulci
The eleven openings into or within the heart
(2) atrioventricular openings
1. left atrioventicular opening
2. right atrioventicular opening
3. (1) pulmonary opening
4. (1) aortic opening
5. (1) opening of the inferior vena cava
6. (1) opening of the superior vena cava
(4) two right and two left pulmonary veins
7. first right pulmonary vein
8. second right pulmonary vein
9. first left pulmonary vein
10. second left pulmonary vein
11. (1) opening of the coronary sulcus
The Valves of the Heart
- Left atrioventricular valve or mitral or bicuspid valve
- Right atrioventricular valve or tricuspid valve
- Aortic valve
- Pulmonary valve
Blood Supply to the Heart
The route of blood supply
The right and left coronary arteries,
the first branches of the aorta,
- supply blood to the heart.
These vessels run along the coronary sulcus and the interventricular grooves on the surface of the heart
giving off branches “en route”
Blood Supply to the Heart
drain blood from the cardiac capillaries
Cardiac veins
Blood Supply to the Heart
is a large vein that lies in the posterior part of the coronary sulcus. It empties into the right atrium. It collects blood from most of the cardiac veins.
Coronary sinus
consisting of a node in the wall of the right atrium initiates the impulses for contraction of the heart
Special Conducting Apparatus
Conducting Apparatus and Nerves of the Heart
when stimulated increase the heart rate
Sympathetic nerve fibers
Conducting Apparatus and Nerves of the Heart
stimulation of them slows the heart rate.
Two vagi nerves (10th cranial)
is the contracting phase of the heart
Systole
is the dilation phase of the heart
Diastole
The Pulmonary Vessels and Circulation
Right ventricle – pulmonary trunk – right and left pulmonary arteries – lung capillaries – two right and
two left pulmonary veins – left atrium
The Systemic Vessels and Circulation
Left ventricle – aorta – branches – capillaries – tributaries of – superior and inferior vena cava – right atrium
Trunk artery of the systemic of general circuit.
Aorta
Parts of the Aorta
- Ascending aorta
- Aortic arch
- Descending thoracic aorta
- Abdominal aorta
Branches of Ascending Aorta
Right and Left Coronary arteries
Branches of the Aortic Arch (enumerate)
( BT, RCCA (RECA, RICA) RSA, LCCA (LECA, LICA))
- Brachiocephalic Trunk
- The right common carotid artery
* The right external carotid artery
* The right internal carotid artery - The right subclavian artery
* Axillary artery
* Vertebral artery - The left common carotid artery
* External carotid artery
* Internal carotid atery
- The right common carotid artery
Branches of the Descending Thoracic Aorta
- Mediastinal
- Esophageal
- Pericardial
- Intercostal
- Superior phrenic
- One right and two bronchial arteries
Branches of Abdominal Aorta
- The paired branches
- Unpaired branches
The paired branches of the Abdomical Aorta
- Inferior phrenic arteries
- Middle suprarenal arteries
- Renal arteries
- Ovarian and Testicular arteries
- Lumbar arteries
The unpaired branches of the Abdominal aorta
- Celiac Trunk (celiac axis)
- Gastric
- Splenic
- Common hepatic arteries
- Superior mesentric artery
- Inferior mesenteric artery
- Middle sacral arte
The Terminal branches of the Abdominal Aorta
Left common iliac artery
* Left internal iliac artery
* Left external iliac artery
Right common iliac artery
* Right internal iliac artery
* Right external iliac artery
The Superior Vena Cava and Tributaries
- Superior Vena Cava
- Azygos vein
Parts of the Superior Vena Cava
Right and Left brachiocephalic vein
* Internal jugular vein
* Subclavian vein
* Axillary vein
* External jugular veins
* Vertebral vein
The Superior Vena Cava and Tributaries
right side of the mediastinum, intercostal, esophageal, pericardial, intercostal, and right bronchial veins.
Azygos vein
Two parts of Azygos vein8
- Hemiazygos vein
- accessory hemiazygos vein
Inferior Vena Cava and Tributaries
- Common iliac vein (R and L)
- Abdominal tributaries
The Inferior Vena Cava and Tributaries
Parts of the Inferior vena Cava
Common iliac vein (R and L)
* Internal iliac vein (R and L)
* External iliac vein
Abdominal tributaries of the Inferior vena cava
Abdominal tributaries
* Ovarian or testicular veins
* Renal veins
* Suprarenal veins
* Phrenic veins
* Lumbar veins (4 pairs)
The Portal Vessels and Circulation
- Portal vein
- Abdominal aorta
The Portal Vessels and Circulation
The parts of the Portal vein
- Superior mesenteric vein
- Splenic vein
* Inferior mesenteric vein - Cystic vein, coronary, pyloric veins
The Portal Vessels and Circulation
Parts of the Abdominal aorta
- Celiac Trunk (celiac axis)
- Gastric
- Splenic
- Common hepatic arteries
- Superior mesentric artery
- Inferior mesenteric artery
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