Heart Anatomy
Without SA node input, what would the heart rate be?
50 beats per minute
what is the main purpose of the circulatory system?
The circulatory system's primary function is to transport oxygen, nutrients, and hormones to cells while removing waste products like carbon dioxide.
How does the journey of oxygen start?
starts with inhalation through the nasal cavity.
What is the best definition of arteries?
Carry blood away from the heart.
What is the main function of the respiratory system?
To supply the blood with oxygen.
Cardiac muscle tissue is found in which layer of the heart?
Myocardium
What are the main components of the circulatory systems.
The circulatory of blood vessels the heart and blood.
2nd step of where oxygen journeys?
travels through the pharynx, larynx and trachea.
What does circulatory mean
The movement of blood throughout the body.
How does the respiratory system deliver oxygen to different parts of the body?
It inhales oxygen, which is then transported through the bloodstream.
Blood is prevented from flowing back into the left ventricle by the...
Aortic semilunar valve
Resistance increases when
Radius decreases
How does oxygen enter the body?
primarily thought the nose or mouth during inhalation.
What does respiratory mean?
how we breathe.
What structure prevents food and liquid from entering the lungs?
The epiglottis.
Which blood vessels leave the heart and transport blood to the lungs.
Pulmonary arteries
What direction does blood flow in arteries carry blood away from the heart, and veins carry blood back to the heart?
Arteries carry blood away from the heart, and veins carry blood back to the heart.
Oxygen from the atmosphere is used up in process, namely?
Combustion,respiration, and in the form of oxides of nitrogen.
what is a vein?
A blood vessel that carries blood back towards the heart.
What is the main role of the diaphragm in the respiratory system?
It's a muscle that helps to pull oxygen into the lungs and pump carbon dioxide out.
How many times does a heart beat during a person's lifetime?
2 and a half billion times.
At which organ below receives the most blood flow?
Kidney
What is the last step that the oxygen takes when on its journey?
into the bronchi.
What is a capillary?
A tiny blood vessel connecting arteries and veins.
What is the function of the nasal cavity?
It warms, moistens, and cleanses inhaled air.