Cardiovascular System Flashcards
Types of circulation (4)
Closed
Open
Pulmonary
Systemic
Functions of bloods(6)
Exchange of respirators gases
Transportation of nutrients
Facilitates excretion of waste products
Transportation of specialized blood cells
Transportation of hormones of the endocrine glands
Facilitate countercurrent heat exchange
2 major components of blood
Plasma
Cellular components
Holds the blood cells in the whole blood suspension
Plasma
Serous membrane that partially surrounds the heart
Pericardium
Provides the lubrication for the heart during contraction
Pericardium
2 divisions of pericardium:
Visceral pericardium
Parietal pericardium
3 layers of heart
Epicardium
Myocardium
Endothelium
A condition due to reduced number of red blood cells or hemoglobin content in the blood
Anemia
A condition due to excessive red blood cells or circulating in the blood
Polycythemia
A condition associated with a decrease in the number of white blood cells
Leukopenia
A condition associated with an increase in the number of white blood cells
Leukocytosis
The blood clot attached to the interior wall of either a vein or an artery
Thrombus
The clot that is circulating in the blood
Embolus
Abnormally slow heartbeat
Bradycardia
Abnormally high heartbeat
Tachycardia
No heartbeat
Arrhythmia
Components transported in blood (6)
Respiratory gases
Nutrients
Waste products
Specialized blood cells
Hormones
Heat
Only 1% of the blood volume
White blood cells (leukocytes
Species with nucleated erythrocytes
Reptiles & amphibians
Avians
Teleosts (fish)
Species with enucleated erythrocytes
Cat
Dog
Human
Responsible for blood clotting
Platelets
Produces antibodies, neutralizes or fixes toxins
Lymphocytes
Variety of white blood cell that tend to increase in number during allergic and parasitic condition
Eosinophils
Type of white blood cell that produces antibodies neutralizes or fixes toxins
Lymphocytes
RBCs are reduced in number or hemoglobin content
Anemia
Excessive RBCs are found in the circulating blood
Polycythemia
Decrease in the number of WBCs
Leukopenia
Increase in the number of WBCs
Leukocytosis
A blood clot attached to the interior wall of a vein/ artery
Thrombus
A clot that is circulating in blood
Embolus
A cone-shaped hollow muscular structure
Heart
Directed dorsal or cranio-dorsal and is attached to other thoracic structures by large arteries, veins, and the pericardial sac
Base
Directed ventral and is entirely free within the pericardial sac (heart)
Apex
Outer serous covering of heart
Epicardium
Thick muscular layer of heart
Myocardium
Inner endothelial lining of heart
Endocardium
Chambers of the heart
Atrium
Ventricle
Heart chamber that receives blood
Atrium
Heart chamber that pumps blood
Ventricle
Valves of the heart
Atrioventricular valve
Semilunar valve
Components of semilunar valve
Aortic valve
Pulmonary valve
Fibrous cords found in the heart
Chordae tendineae
Small muscular projections in the heart
Papillary muscles
Great vessels of heart (4)
Vena cava
Pulmonary arteries
Pulmonary veins
Aorta
Vessels in cardiovascular system (cavva)
Capillaries
Arteries
Veins
Venules
Arterioles
Tubular structures that carry blood away from the heart
Arteries and arterioles
Veins are _____ in diameter than the arteries and have much thinner walls
Larger
Relaxation of a chamber of the heart just prior to and during the filling of the chamber
Diastole
Contraction of a chamber of the heart that drives blood out of the chamber
Systole
First sound or S1, marks the beginning of systole
Lub
Second sound or S2, marks the beginning of diastole
Dub
Measures the pressure in the arteries when the heart muscle contracts
Systolic blood pressure
Measures the pressure in the arteries when the heart rests between beats & is refilled with blood
Diastolic blood pressure
Pacemaker of the heart
Sinoatrial node
Largest vein
Vena cava