Chapter 10 Flashcards
Epicardium
Outer layer covering the surface of the heart
Myocardium
Middle layer consisting of of the cardiac muscle itself
Endocardium
The innermost layer that lines the chambers of the heart and covers it’s valves
Pericardium
Tough, sac-like membrane enclosing the entire heart
Atria
Upper two chambers of the hollow part of the heart
Ventricles
Lower two chambers of the hollow part of the heart
Septum
Separated Atrium and ventricles
Mitral valve
Bicuspid (2 flaps)
Controls flow between left atrium and right ventricle
Tricuspid valve
3 flaps
Controls flow between right atrium and ventricle
Semilunar valves
Shaped like a half moon
At the base of pulmonary artery to prevent backflow of blood from arteries and ventricles
Aorta
Largest artery
Originates from left ventricle of the heart
Pulmonary artery
Along with veins, transports CO2 and waste products into the lungs
Atria contract
Blood is forced through the bicuspid valves into the ventricles while the semilunar valves close to prevent blood flowing to the aorta or pulmonary artery
Atria relax
Blood enters atria from the pulmonary veins and venae cavae
Ventricles contract
Bicuspid and tricuspid valves close
Semilunar valves open
Ventricles relax
Semilunar valves close
Bicuspid and tricuspid valve open
Atria contracts
Function of blood
Transports oxygen to and CO2 from tissues and cells in the body
Controls temperature of the human body
Chemical balance in the body
Supports the immune system by means of phagocytic actions of the leukocytes
Plasma
Fluid component of blood in which cells are suspended
Erythrocytes
Red blood cells
Leukocytes
White blood cells
Thrombocytes
Platelets
Erythropoiesis
Formation of erythrocytes
Occurs in blood marrow
Erythroblasts
Immature erythrocytes
Akaryocyte
Mature erythrocytes
Haemoglobin
Iron-containing pigment of erythrocytes
Hypoxia
Insufficient oxygen in the body
Granulocytes
Leukocytes with granules
Functions of thrombocytes
Coagulation of blood
Haemostasis
Coagulation
Process during which blood cells clump together to form a blood clot
Haemostasis
Arrest of bleeding
Lymphatic system function
Remove excess lymph (protein rich fluid) from the tissues and transport it back to the circulating blood
ANEURYSM
Dilation
ANGIN-
Choking pain
AORT-
Aorta
ARCT(AT)-
Compress