grt
3 parts of the system of the heart
- endocardium (inner lining)
- myocardium (muscular middle layer)
- epicardium (outer layer)
What is hemogoblin
An iron rich protein inside red blood cells - carries oxygen room the lungs to the rest of the body
platelet activation
a very fast process where small blood cells (platelets) become sticky and change their shape to seal damage in blood vessels.
left atrium
one of the four chambers of the heart , acting as a holding chamber for oxygenated blood returning from the lungs
cardiovascular
relating to the heart and blood vessels
Aorta
the largest artery in the human body , acting as the main pipe for oxygen-rich blood
Red blood cells - the most common type of blood cell in the body. They are responsible for carrying oxygen from the lungs to the body tissues, and they remove carbon dioxide waste.
oxygenation
where poorly oxygen blood that was returned from the body is pumped by the right side of the heart to the lungs to pick up oxygen, returning oxygen rich blood to the left side of the heart to be passed into the body
vena cava
the largest vein in the body, acts as the main pipe to return oxygen-poor blood from the body back into the heart
What is a closed circulation?
A network where blood is entirely contained in vessels (arteries, veins, capillaries) - they are pumped by the heart and never a bathing tissue.
pulmonary artery
a vital vessel carrying deoxygenated blood from the hearts right ventricle to the lungs for oxygenation
systole
the hearts contraction phase, where the lower chambers (ventricles) squeeze , pumping blood out to the lungs and body
thermoregulation
the cardiovascular systems role in maintaining heart to keep a stable body temperature.
deoxygenation
the process of oxygen deplated (venous) blood that returns from the bodys tissues to the right side of the heart, where it is pumped to the lungs to receive oxygen again.
what is ventricle
one of the two large muscular lower chambers of the heart that act as the main pumps of the heart
Vasodilation
the widening of blood vessels (arteries and veins) - tey are caused by the relaxation of smooth muscle cells in the vessel walls.
pericardium
a protective , two layered sac sorrounding the heart , that acts as a fluid filled pouch
leukocytes
the bodys primary defense cells produced by bone marrow- fight infections, diseases and foreign invaders
vasoconstriction
the narrowing of blood vessels - caused by tight smooth muscle in their walls.
atrium
the two chambers of the heart that receive blood
right atrium
the upper right chamber of the heart that receives deoxygenated blood from the body through the superior / inferior vena cava and pumps it through the triscupid valve, into the right ventricle
circulatory
relates to the circulation of blood
platelets
tiny colorless cells in the blood that responds to injury (also called thrombocytes)
auricle
a small muscular pouch that sticks out of each of the hearts top chambers (atria)
diastole
the resting phase of the hearts cycle where the ehart muscle relaxes, allowing the chambers to widen and fill with blood