Circulatory System (Part 1) Flashcards
Sum total of the chemical changes within the cells
Metabolism
Waste products of the cells
Metabolic wastes
3 parts of the Vascular System
Arteries, Capillaries, and Veins
Brings blood from the heart
Arteries
Artery branches
Capillaries
Bring blood back to the heart
Veins
Waste materials diffuse through the capillary walls and into the bloodstream
Closed transport system
Has a tubular heart, then out into body cavity
Open transport system
Food diffuses into the cells and waste materials diffuse out
Open transport system
Collecting vessel near the posterior end of the body and is back to the heart
Open transport system
4 keywords of blood vessel structure
Epithelial cells
Circular manner
Elastic fibers among the smooth muscle Tough connective tissue with some elastic fibers and nerve cells
3 keywords of structure of blood vessels
Middle layer is thicker in the artery
Space inside a vein is wider than artery of the same diameter
Valves, formed by reduplication of the inner lining of the veins
Single layer of epithelial cells and covered thin layer of fibrous material, same as the other two blood vessels
Capillary
The heart has two parts?
Atria and Ventricles
Receiving chambers of the heart
Atria
Pumping chambers of the heart
Ventricles
The portion of the ventricles where it only serves the lungs
Right ventricles
The portion of the ventricles where it serve the rest but not the lungs
Left ventricles
Is the ventricles thicker than atria?
True
Size of the heart
Size of a fist
Location and Direction of the heart
Chest cavity, lower tip slightly pointed toward the left
Tough sac of the heart
Pericardium
Protection of the heart from external injury
Rib cage
10 Structure of the human heart
Pulmonary artery, Pulmonary vein, Mitral valve, Aorta, Superior vana cava, Pulmonary valve, Tricuspid valve, Inferior vena cava, RA-RV, LV-LA
Rhythmic contraction of the heart muscles
Heartbeat
First step of heart beat
RA contracts and so LA; Blood to ventricles; Relaxation of Atria
Second step of heart beat
Right ventricle and Left ventricle contract; Blood to arteries; Relaxation of ventricles
Third step of heart beat
Short pause
How many times of heartbeat per minute?
70
Rushing out of the ventricle imparts pressure on the wall of the artery
Blood pressure (due to artery is elastic, it recoils)
Do the pressure lowered when the blood is in the vains?
True
Restrict blood flow + mechanical manometer
Sphygmomanometer
