Circulatory System Flashcards
Joe does the respiratory system use the circulatory system
To deliver oxygen
How does the digestive system use the circulatory system
Deliver nutrients
4 functions of the cardiovascular system
Deliver oxygen, nutrients, remover waste, CO2, and other waste
Is the system open ?
No it is a closed system of the heart and the blood vessels
What is the movement of blood in the heart
Into the right side, out to lungs, into left side, out to the body
Pulmonary circulation
Oxygenated blood and removes CO2
Systemic circulation
Provides nutrients to cells and removes waste
Difference between artery and veins
Attires carry blood always from heart to rest of body, veins carry blood from the rest of the body to the heart
What Carries the blood around (5 things)
Arteries, arterioles, capillaries, venues, veins
What are arteries/arterioles
Muscular walls, moves blood away from heart, they have a pulse,
What regulates arteries
The ANS (autonomic nervous system)
What are arterioles connected to
Capillary beds
What are capillary beds
A intertwined network of capillaries that supply an organ( ex the beds in the digestive system are open after eating so the capillaries can pick up nutrients) open means blood is flowing
Where is the the subclavian and what is it
It is near the shoulder and it a major artery
Where and what are jugular veins
They are part of the major arteries and are in the neck and take blood from the head to the heart
What are where are the carotid arteries
They are arteries that supple the head with oxygenated blood and are in and around the neck
What are the mesenteric arteries
They supple blood to the intestines
Anterior and posterior vena cava
The anterior delivers deoxygenated blood from higher parts of the body to the right side of the heart. The posterior carries deoxygenated blood from lower parts of the body into the right atrium
Pulmonary veins/ arteries
Arteries carry oxygenated from heart to lungs. Veins bring blood from lungs to heart
Hepatic portal vein
Gets blood from small intestine and goes to liver
Hepatic vein
delivers blood from liver to heart
Renal arteries/ veins
Veins carry blood from kidney to posterior vena cava (heart). Arteries carry blood from heart to kidneys
Aorta
Top of left ventricle and delivers oxygenated blood to the body
What are capillaries
They are the smallest blood vessels
What do capillaries do
They are responsible for nutrients and waste exchange.( nutrients and oxygen delivered, co2 and waste removed)
Veins
Move blood towards heart (usually deoxygenated)
Venules
They are small veins that receive blood from capillaries
Do veins have valves
Yes to stop back flow
What helps blood move back to the heart
Muscle contractions
How are capillaries, venules and veins connected
Capillaries join to make venules which join yo make veins
Why happens when arteries age
They lose elasticity and plaque can build up on the walls
Varicose veins
They are enlarged, dilated veins due to too much pressure
Blood pressure
The pressure of the circulating blood against the walls of blood vessels
What are blood vessels
Arteries, capillaries, venules and veins
Osmotic pressure
Pressure that is due to proteins staying in capillaries
What are capillaries the location for
The exchange between plasma, tissue fluid and cytosol
Cytosol
Guild of the call
How does oxygen and nutrients move
From blood to tissues
How does waste at CO2 move
From tissues to blood
Movement of things in capillaries
Proteins
Water, oxygen, glucose
CO2, waste
Proteins stay in, water and oxygen and glucose move out, CO2 and wastes movie in
How does blood get oxygenated
Passes through the lung tissue. Where oxygen bonds with hemoglobin
Hemoglobin
The protein in red blood cells that pick up oxygen
How is blood pressure after getting oxygenated
It is 1/3 less of the pressure for when it first come out of the heart
How does fluid exchange effect blood volume
No change in total blood volume
Histamines
Enlarged pours in blood vesicles
What do metarterioles
They bypass capillaries, shut blood directly between arteriole and vein
What is the Lymphatic system
It is thin walled vessels that drain excess fluid. It cleans fluids with the lymph nodes.
What is the relationship between capillaries and lymph vessels
Excess water and solutes that are filtered out of the capillaries are then picked up my the lymph vessels and then go back into circulation
How is the heartbeat controlled
Intrinsically and extrinsically
What is an intrinsically controlled heartbeat
It means the best is regulated by mechanisms in the heart not the brain
Extrinsic heartbeat
Slowed and sped up by brain impulses but not controlled
Intrinsic heat control
Nerve tissues embedded in cardiac cells controls the heart
AV node (atrioventricular)
The AV node conducts impulses and controls the fate at which they are sent to the ventricle (right side)
SA node (sinoatrial)
The pacemaker starts impulses and trigger contraction of the atria
How many steps of the heartbeat
5
Step 1 of heartbeat
Electrical activity goes to the Av node through internodal pathways
Step 2 heartbeat
Depolarization speeds across the right atria and is slowed by the AV node
Step 3 of the heartbeat
Depolarization moves through the ventricular conducting system to the apex of the heart
Step 4 of the heartbeat
The depolarization enters the ventricles and speeds upwards to the apex
Extrinsic heart control
Impulses from the brain control the speed of the heartbeat
What is extrinsic heart control part of
The autonomic nervous system
