Lab Q3 Flashcards
What type of system do we have?
Closed system: blood circulates continuously
•Fluid is confined to blood vessels
What are arteries?
carry blood away or out from the heart
Arterioles?
small blood vessels that carry blood away from heart
Capillaries?
very thin blood vessels where the gas and nutrient exchange occurs, brings blood throughout the tissues of the body.
Venules?
small blood vessels that carry blood back to the heart
Veins?
Large/medium blood vessels that carry blood to the heart
What are some functions of blood?
Transport of nutrients, gases and wastes
•Maintenance of a proper internal environment (ie. Hormones)
•Protection of the organism against disease (White blood cells)
Every day it beats ——- times and sends ——-gallons of blood throughout the body.
100,000 times and sends 2,000 gallons of blood throughout the body.
We have about how many quarts of blood? which circulates through the body how many times a minute?
5.6L (6quarts) of blood, which circulates through the body 3 times every minute.
How much blood is pumped with each heartbeat?
70ml/beat
How many miles of blood vessels do we have?
60,000 miles of blood vessels
What is the heart contained in? And what separates it
It is contained within a loose sac called the pericardium. A thin film of fluid lies between the heart and the pericardium. Prevents friction.
Superior vena cava?
brings blood from upper body to the heart
Inferior vena cava?
brings blood from lower body to the heart
Aorta?
Biggest blood vessel in the body, carries oxygenated blood out to the body
Pulmonary Arteries?
Carries blood from the heart to the lungs
Pulmonary Veins and how many?
Carry oxygenated blood from the lungs to the heart
•2 right pulmonary veins and 2 left pulmonary veins
What is the primary function of the heart?
pumps blood that carys oxygen, nutrients, white blood cells, hormones, and waste products.
Which side of the heart pumps blood to the lungs?
Right
Which side pumps blood through the aorta and to the entire body?
Left
Why are heart valves important for the efficiency of the circulatory system?
They allow flow in only one direction through the heart.
Atrioventricular valves (AV valves)?
Allow blood to flow from the Atria into the Ventricle. As the ventricle relaxes these valves open and blood flows in from the Atria. As the ventricle contracts it pushes blood against AV valves forcing them closed.
Mitral valve
Left Atrium and Left Ventricle
Tricuspid valve
Right Atrium and Right Ventricle