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Circulatory system refers to..
Heart, blood vessels, and blood.
Cardiovascular system refers only to ...
Passages where blood flows..(heart, arteries, veins, and capillaries).
2 major divisions of cardiovascular system are:
- Pulmonary circuit
- Systemic circuit
Which circuit supplies blood to the body?
Pulmonary circuit carries blood to ____ and then returns to _____.
- Blood to lungs
- Returns to heart
Heart right pump = _____.
Heart left pump = ______.
- Right pump = Pulmonary
- Left pump = Systemic
Which side of the heart (name the circuit) receives deoxygenated blood from body?
- Right , pulmonary circuit
- [It contains wastes, low nutrients and lots of CO2]
Pulmonary circuit receives deoxygenated blood from body that contains wastes, low nutrients and lots of CO2 and pump blood into _______.
Which divides into __& __ pulmonary _____.
Transport blood to ____.
_______ is unloaded. ______ is picked up.
Then oxygen rich blood flows back to heart via the _______.
- Pulmonary trunk
- Divides into left & right pulmonary arteries.
Transport blood to lung.
- CO2 unloaded. Oxygen picked up.
- Oxygen rich blood flows back to heart by pulmonary veins.
Systemic circuit is which side of the heart?
_____ leaves the left heart (systemic circuit) via the ______.
Oxygen rich blood leaves L Heart via Aorta.
Aorta contains large arch called____.
Passes downward, dorsal to heart
gives off ______ that supply to
_____,____, upper limbs.
Then Aorta travels through ______ and _______ cavities.
Gives off arteries that supply head, neck, upper limbs.
Aorta then travels through thoracic & abdominal cavities.
Purpose: sends off vessels that feed the body.
What travel through thoracic and abdominal cavities to sends off vessels that feed the body?
Blood then returns to right _____ via 2 large _____.
Blood then returns to right heart via 2 large veins.(inferior vena cava, superior vena cava)
2 large veins that return blood to the heart?
1. Inferior vena cava: blood from lower portions of body.
2. Superior vena cava: blood from upper portions of body.
Heart located in ______ cavity in the mediastinum.
Heart is roughly the size of a fist.
Weighs about ____oz.
- thoracic cavity
- heart = 10 oz.
2/3 of heart lies left of _____plane (normal axis).
Broad superior portion is the _____.
Inferior end is called ______.
- Superior portion = base
- Inferior end = apex
What is double walled sac enclosing heart?
Pericardium anchored to _______from below and to _______tissue of _______above.
Anchored to disphragm from below and to connective tissue of great vessels above.
Tough fibrous layer of dense irregular connective tissue and a thin smooth serous layer...
Parietal pericardium - covers heart surface
What covers heart surface
Parietal pericardium turns inward at base and forms __________.
Pericardial cavity lies between?
contains ____ml of ______fluid.
visceral and parietal pericarium
5-30 ml of pericardial fluid
Pericardial fluid function...
Allows heart to beat w/ no friction, lubricates membranes, provides cushion
Pericarditis? Results in?
Inflammation of pericardium , results in friction and therefore pain w/ each beat.
Heart wall = #___ layer and what are they?
3 layers: epicardium, myocardium, endocardium.
- 1. •visceral pericardium
- –Serous membrane
- –Simple squamous epithelium overlying thin layer of areolar connective tissue
- –Surface of heart has thick fat deposits
- `Fill grooves of heart surface and protect coronary vessels
- `Nonfatty areas are thin and translucent
- 2. Myocardium = muscle mass
- 3. Endocardium = smooth inner lining
- continuous with vessels
What is smooth inner lining of the heart wall?
Which layer of heart has thick fat deposits on the surface of the heart?
Thickest layer of the heart is...
Composed of ______.
- Composed of cardiac muscle.
- Performs heart work: Muscle cells spiral around heartBound together by meshwork of collagenous and elastic fibers (known as fibrous skeleton)
–Simple squamous endothelium
•Overlies a thin______tissue layer
•Forms smooth inner _____ of chambers and valves
•Is continuous with ________ of vessels
endothelium of vessels