Week 7 Flashcards
The cardiovascular system
Transports nutrients and oxygen
While carbon dioxide and waste products are removed
Pulmonary circulation
From the heart to the lungs and back
Systemic circulation
From the heart to the body tissue and back
Arteries
Carry blood away from the heart
Have thicker walls
Veins
Take blood back to the heart
Thinner walls and valves
Varicose veins
Standing too long so the valves in your veins stop working
Blood flow moves up and down
Top of the heart is called
The base
Bottom of the heart is called
Apex
Fibrous pericardium and what’s inside it
Tough membrane that surrounds the heart
Inside is the is the pericardial cavity filled with fluid
Superior vena cava
Brings blood back from the head, neck, chest, and upper extremities
Inferior vena cava
Returns the blood from the truck, organs, abdomen, pevic region, and lower extremities
Atria
Top two chamber of the heart
Supplying oxygenated blood to the circulatory system
Ventricles
Bottom two chambers of the heart
Tricuspid valve
Blood collects in right atrium, this valve opens to allow blood to flow into the right ventricle
Has three cusps or folds
The septum
Walls that separates the left and right side of the heart
Pulmonary veins
How newly oxygenated blood returns to the heart
Bicuspid (mitral) valve
How Blood passes into the left ventricle
Aortic semilunar valve
Blood passes through from the left ventricle to the aorta
Coronary arteries
On the surface of the heart
Divert blood from the aorta
SA node
Peacemaker of the heart
Systole
The time when both chambers are contracting
Diastole
The period of time when the heart is relaxing
Blood
Fluid form of connective tissue
Transports
Regulates
Protect
Aortic semilunar valve
aorta and then through the arteries
Coronary arteries
on the surface
supply blood to heart muscle
Myocardium
Heart muscle
Sinoatrail or SA node
Inferior wall of right atrium
Generates 40-60 beats per minute
Plasma
Is a straw coloured liquid that makes up 55% of our body
Erythrocytes
Red blood cells
Contains hemoglobin molecules
Carry oxygen and CO2
Leukocytes
Whit blood cells
Protects from infection
Platelets
Thrombocytes
Helps with blood clotting
Coagulation
Blood clotting
Capillaries
Site of gas exchange between blood and interstitial fluids
One cell thick
Blood pressure
Force and rate of the heartbeat and the diameter and electricity of the arterial walls
Controlled by the blood vessel
Left side heart failure
The left side cannot keep up with the blood being delivered to it, the blood banks up into the lungs, increasing the pressure in those vessels
Fluid leaks out
Causes difficulty breathing
Arteriosclerosis
Hardening of the arteries
Atherosclerosis
Fatty deposits called plaques, build up on the inner lining of blood vessels
Infarct
An area of death in a tissue or organ resulting from obstruction of the local circulation by the thrombus or embolus
Ischemia
blood flow is restricted or reduced in a part of the body
Pericardium
A membrane the surrounds your heart
The septum
A dividing wall or membrane especially between bodily spaces or masses of soft tissue
AV node
the heart atrium and superior vena cava
Generated 60-100 impulses per minute
Atrioventricular valves
Lie between each atrium and the ventricle on the same side
Semilunar valves
Between the ventricles and the large arteries that carry blood away from the heart
Pulmonary semilunar valve and aortic semilunar valve
Venules
Smaller blood vessel
Deoxygenated blood to capillary beds
Arterioles
Smaller blood vessels
Carry blood away from your heart
Endocardium
Inner most layer of the heart
Pulmonary arteries
Bring Oxygen poor blood to from right side of the heart to the lungs
Aorta
Main artery that carries blood away from your heart
Cardiac cycle points to remember
Both atria fill at the same time
Both ventricles fill at the same time
Both ventricles eject blood at the same time
Different roles of blood
Maintain homeostasis
Fluid balance
Regulate temperature
Different components of blood
Plasma and formed elements
Red blood cells, white blood cells, platelets
Thrombin
Transforms fibrinogen into a insoluble form call fibrin
Fibrin
Hair-like
Forms a net like patch at the site of injury
That catches blood cells and platelets
Blood vessels
Distributes blood around the body
Prothrombin
Produced in the liver to help convert vitamin k into thrombin
Colour of the blood when oxygen is high
Bright red
What causes shortness in breath from fluid in the lungs
Right sided heart failure
Pathway of blood
From your body,
Through superior vena cava,
To right atrium,
To right ventricle,
Sent to the lungs,
To the left atrium
To left ventricles
To aorta