The Circulatory System Flashcards
(17 cards)
What are the 6 functions of the circulatory system?
-Supply tissues with O2 and nutrients.
-Remove wastes such as CO2 and ammonia
-Help in maintaining temperature and pH
-Transports hormones
-Transports antibodies and white blood cells
-Clot blood
What is blood?
The transport medium
What is the heart?
The pump.
It supplies pressure to move the transport medium through the system.
What are blood vessels?
The transport tubes.
What are the 3 primary types of circulation?
Cardiac circulation
Pulmonary circulation
Systemic circulation
What is cardiac circulation?
Feeds the heart itself.
The heart receives nutrients during diastole.
Coronary arteries and veins service the heart.
What is pulmonary circulation?
Circulates blood between the heart and lungs.
Gas exchange between alveoli and pulmonary capillaries.
What is systemic circulation?
Circulation of blood from the heart to all other body organs.
What does the heart move blood through?
The arteries and capillaries
Basic description of the shape of the heart and location?
Cone shaped, about the size of your fist.
Sits behind the sternum and tucked into the cardiac notch of the left lung.
What 3 types of tissue is the heart made of?
Cardiac muscles, nerve tissue, and connective tissue.
What does the frequency of the heart change based on?
Physical activity, stress and general health.
What’s the pericardium?
A sac of epithelial and fibrous issue which contains fluid that reduces friction.
What is the septum?
A thick, muscular wall that separates the two halves of the heart.
What does the septum ensure?
Ensures that O2 and CO2 blood don’t mix.
What does not mixing O2 and CO2 blood ensure?
That the concentration gradient is maximized at the alveoli and at the body cells and thus increases the rate of diffusion.
What happens if your septum isn’t fully developed?
The blood pumped will have lower O2, therefore the heart rate and breathing rate would have to go up to compensate.
