Circulatory system Flashcards
What does the costocervical trunk supply?
The hypaxial and epaxial muscles of the cervicothoracic junction, extrinsic muscles of the thoracic limb, the intercostal muscles
What does the cranial laryngeal artery supply?
Muscles of the larynx and laryngeal muscosa
What tendon is the median artery associated with in the carpal canal?
The deep digital flexor
Where does the median artery supply blood to?
The palmar aspect of the manus
What is the functional muscle group that the subscapular artery supply to?
the retractor of the limb (latissiumus dorsi), flexors of the shoulder joint (deltoideus, teres major), extensors and flexors of the elbow joint
What are the four vessels that are given off the external carotid artery before it becomes the maxillary artery?
Caudal auricular artery, superficial temporal artery, lingual artery, facial artery
What are the components of the carotid sheath?
common carotid artery, internal jugular vein, lymphatic duct (left tracheal duct), vagosympthatic trunk
What artery exits the infraorbital foramen and what is its immediate parent artery?
Infraorbital artery arises from the maxillary artery
What major artery courses through the oval foramen and from what artery does it arise?
Middle meningeal artery which arises from the maxillary artery
What is the function of the coronary sinus?
It is where the great cardiac vein empties blood into the right atrium
What is the function of the intervenous tubercle?
It diverts blood from the cranial and caudal vena cava toward the right ventricle
What is the course of the internal thoracic artery through the thoracic cavity and what arteries does it gives rise to?
Gives rise to the ventral intercostal arteries and at the 9/10th costochondral junction it divides into the musculophrenic artery to supply the diaphragm and the cranial epigastric artery, which supplies the abdominal muscles and the mammary tissue
Name the three major branches of the celiac artery and the organs they supply?
Splenic artery- left lobe of the pancreas, spleen, and stomach
Hepatic artery-liver, gall bladder, stomach, duodenum, right lobe of pancreas
Left gastric artery-stomach and esophagus
Where does the vagus nerve travel?
Through the diaphragm with the esophagus through the esophageal hiatus of the diaphragm
What major artery supplies the cecum and from what artery off the aorta does this artery arise?
Middle colic artery which arises from the cranial mesenteric atery
What muscles are supplied by the deep circumflex iliac artery?
Sublumbar muscles, caudal part of flank region and cranial aspect of thigh
What tissues do branches of the caudal mesenteric artery supply?
descending colon and rectum
is there a corresponding artery with the lateral saphenous vein?
No, but there is one with the medial saphenous vein
What are the two major branches and their targets of the deep femoral artery?
Pudendoepigastric trunk, inguinal region, caudal mammary glands, floor of the abdomen
Medial circumflex femoral artery-medial group muscles of the thigh region
What muscles do the cranial tibial artery supply?
Craniolateral group muscles of the crus
Indicate the course o fan antibiotic given orally from the site of absorption to the target organ, the kidney.
Absorbed in the small intestine ->cranial and caudal mesenteric veins->hepatic portal vein->hepatic vein->caudal vena cava->right atrium->right ventricle->pulomanary arteries->pulmonary veins->left atrium->left ventricle->aorta->renal artery->kidney
The atrioventricular valves close preventing backflow of blood into?
The atria during diastole and filling
Arteries are blood vessels that?
Lead away from the heart
Blood supply to the liver, spleen and stomach is carried in?
Celiac artery
The right subclavian artery supplies?
Oxygenated blood to the right fore limb
Lymph from the lower half of the body drains into?
Cisterna chyli
What are the major lymphatic organs?
Tonsil, spleen, and thymus
The main blood supply of the brain in dogs is?
The internal carotid arteries
The main blood supply of the brain in cats is?
Branches of the maxillary artery
Which part of the intestine has a blood supply on both its mesenteric and antimesenteric borders?
Ileum
The blood supply to the bladder is via what arteries?
internal pudendal and umbilical arteries
Where is the heart located?
It is located obliquely in the middle mediastinum
Where does the apex of the heart face?
It is ventrocaudal and more toward the left side
Where does the base of the heart face?
It is dorsocranial and more towards the right side
What covers the heart?
Pericardium
What is the layer of inner pericardium that reflects on to the heart at the base and covers its exterior?
Visceral layer of the serous pericardium (epicardium)
What happens during pericarditis?
There is a fluid increase in the pericardial cavity that could be due to infection or penetrating wounds from sharp objects from the stomach. It increases the intra-pericardiac pressure on the heart and decreases cardiac output
Is the heart connected to the sternum?
NO!! At the apex of the heart a phrenico-pericardiac ligament that is formed of the pericardium connects to the sternum and the diaphragm
How far does the mediastinum extend?
It extends from the thoracic inlet to the diaphragm.
What contains the lungs?
The pleural sacs contain the lungs (not the pleural cavity
What is hydrothorax?
It is excessive pleural fluid that is secreted by the serous membrane in the case of pleuritis. It occurs in the pleural cavity
What is pneumothorax?
it is air due to to stab wounds at the cupulae pleura or lungs. It occurs in the pleural cavity
Where does hemothorax occur?
It occurs in the mediastinum that normally extends into the pleural cavity due to punctured mediastinal pleura/e.
What does the mediastinum contain?
It contains the heart, major blood vessels, lymph nodes, lymphatics, nerves, longus colli muscle, esophagus and trachea
How is the position of the heart in the cat different from that of the dog?
the heart is more horizontal and can be auscultated from both sides
Where are the borders of the heart in the dog?
It extends from the 3rd rib to the caudal border of the 6th rib (in some breeds 7th rib)
Where can the heart be auscultated at in dogs?
between 3rd and 5th intercostal spaces
What is the cardiac notch?
It is the area of the heart and the pericardium that is not covered by the lungs, it is present on the right side of the dog
Where is the cardiac notch on the cat?
It is present on both the right and the left sides.
Why is it a good thing that the ventral borders of the lobes of the lungs are thin in all species?
This makes this area useful for cardiac palpation and auscultation
What is the auricular surface of the heart?
It is the part of the heart that faces the left thoracic wall (includes the left and right auricles, entire left atrium, and the greater part of the left ventricle and a part of the right ventricle on the left side)
What is the atrial surface of the heart?
It is the part of the heart that faces the right thoracic wall and it contains the right atrium and the greater part of the right ventricle and a part of the left ventricle that is visible from the right side
What is the purpose of the grooves on the heart?
They demarcate the relative boundaries of the chambers of the heart
Does the paraconal interventricular groove reach the apex of the heart?
No
What is the location of the subsinusoidal interventricular groove?
it is indistinct and lies below the large coronary sinus where the great cardiac vein opens that runs in the coronary groove on the right side.
How many chambers does the heart consist of?
Four- two atria (receive blood), two ventricles (pump blood)
What separates the atria internally? The ventricles?
The inter-atrial septum, the inter-ventricular septum
What is they systole?
When the ventricles contract so the barometer shows a higher reading
What is the diastole?
When the ventricles relax and the barometer shows a lower reading
What demarcates the interventricular septum externally?
the paraconal interventricular groove on the left and the subsinusoidal interventricular groove on the right
Where is the right atrium located?
dorsocranial to the right ventricle
Where does the right atrium receive venous blood from?
The cranial and caudal vena cava, the heart itself via the coronary sinus, and the azygous vein
Where does the great cardiac vein open?
below the opening of the caudal vena cava in the right atrium
What is the main chamber of the atrium?
Sinus venarum cavarum
On what side is the right auricle visible?
On the left