Cardiovascular System Flashcards
What is the normal heartbeat?
60 to 80 strokes per minute
What is the strongest muscle in the body?
The heart?
What is the average heartbeat?
72 strokes per minute
The cardiovascular system consists of what three components?
1) Heart
2) blood
3) blood vessels
What are three components of blood vessels?
1) arteries
2) veins
3) capillaries
The cardiovascular system transports what three things?
1) Oxygen
2) Nutrients
3) Antibodies
What are four components of arteries?
- Carries blood away from heart
- Are thick walled
- Responsible for blood loss
- Decreased in size away from the heart
What are the blood vessels from largest to smallest?
Aorta, artery, ateriole, capillary
What are the 3 components of a capillary?
1) this smallest of all blood vessels
2) thin, single, and layered
3) deliver vital substances to tissue and cells and pick up cellular waste
What are the three components of veins?
1) carries blood back to the heart
2) Contains files to help bloodflow and prevent backward flow
2) venue-all the smallest of all veins, connects to capillaries
What are the four linings of the heart?
1) pericardium
2) myocardium
3) endocardium
4) septum
What is the pericardium?
Large outer layer that cushions the heart
What is the myocardium?
The outer muscular lining of the heart walls
What is the endocardium?
The tough membrane lining the heart chambers
What is the septum?
Divides the heart into two sides
What are the three chambers of the heart?
1) Atrium
2) Ventricle
3) Valves
What is the atrium?
Right & Left upper, thin walled chamber; receive blood
What is the ventricle?
Right & Left lower, muscular walled chambers; pumps blood out of the heart.
What are valves?
Chambers are separated by one-way valves, this prevents blood from flowing backwards o
What is a heart murmur?
When valves the heart don’t close properly blood seeps into the next chamber
What are the four blood vessels of the heart?
1) Aorta
2) Vena Cava
3) Pulmonary Artery
4) Pulmonary Veins
What is the aorta?
Leads from the left ventricle to the rest of the body
Three branches
What is the vena cava?
Going to the head and the other to the rest of the body
2 branches
What is the pulmonary artery?
Carries blood from the right ventricle to the lungs
What are the pulmonary veins?
Carries blood from the lungs, back to the heart, to the left atrium
