Circulatory system

also referred to as the cardiovascular system, is a vital network responsible for

circulating blood throughout the body

Circulatory system

the blood flow to and from most of the parts

of the body

Systemic circulation

the blood flow to and from the lungs, during

which the blood picks up oxygen and returns to the heart

Pulmonary circulation

the blood flow to the heart muscle itself,

which provides it with the oxygen and nutrition it needs to do its job

as a pump

Coronary cicruclation

a venous system in which blood leaves the

intestines and proceeds to the liver before returning to the heart

Hepatic portal system

returns blood to the heart, and the arterial system

carries blood away from the heart

Venous system

the central organ of the cardiovascular system,

responsible for pumping blood throughout the body

Heart

receives deoxygenated blood from

the body through the vena cava

Right atrium

pumps deoxygenated blood to

the lungs through the pulmonary artery

Right ventricle

receives oxygenated blood from the

lungs through the pulmonary veins

Left atrium

pumps oxygenated blood to the

entire body through the aorta, supplying oxygen

and nutrients to tissues and organs

Left ventricle

between the right atrium and

ventricle

Tricuspid valve

between the left

atrium and ventricle

Bicuspid valve

between the right ventricle

and pulmonary artery

Pulmonary valve

between the left ventricle and

the aorta

Aortic valve

refers to the sequence of events

that occurs when the heart beats

Cardiac cycle

contraction phase

of the atria and ventricles

pushing blood through the

heart and into the arteries

Systole

relaxation phase,

heart chambers relax and fill

with blood in preparation for

the next contraction

Diastole

heart's electrical system ensures

coordinated and rhythmic contraction

Electrical activity

natural pacemaker of

the heart. It generates electrical impulses

that initiate atrial contractio

Sinoatrial node

receives the

electrical signal from the SA node and briefly

delays it to allow the ventricles to fill with

blood before contraction

Atrioventricular node

conduct electrical impulses

rapidly through the ventricles, ensuring

synchronized ventricular contraction

Purkinje fibers

responsible for carrying blood to and from the heart and distributing it throughout thE body

Blood vessels

carry blood away from the

heart

generally carry oxygenated

blood, at high pressure

Arteries

largest artery of the body

carrying oxygenated blood from

the heart to the rest of the body

Aorta

main

blood supply of the heart

itself; they are the first

branch of the aorta

Coronary artery

return blood to the heart

have thinner walls and often

contain valves to prevent

backflow of blood

generally transport

deoxygenated blood

Veins

Superior and inferior /

cranial or caudal

largest veins in the body

that carry deoxygenated

blood to the heart

Vena cava

the site of nutrient, gas, and

waste exchange between the

blood and tissues, essential for

maintaining cellular function

and homeostasis

Capilliaries