topic 2: the heart

Question 1

what is the heart

Answer 1

-an organ pumps blood around the body in a double circulatory system

Question 2

what muscle is the heart made from

Answer 2

cardiac muscle

Question 3

what are the parts of the deoxygenated side of the heart

Answer 3

-pulmonary artery

-right atrium

-vena cava

-right ventricle

Question 4

what does the coronary artery do

Answer 4

-acts as a natural pace maker

-supplies oxygenated blood to the heart muscle

Question 5

how does the heart pump

Answer 5

-The heart has a group of specialised cells
-these generate electrical impulses and make the heart contract independently
-we say these cells act as a pacemaker
-they are located in the right atrium

Question 6

how does blood flow on the right side of the

Answer 6

-deoxygenated blood comes through the vent cava into the right atrium
-the blood then goes down to the right ventricle through a valve.
-then the heart pumps and the blood goes back through the pulmonary artery.
-this then gets taken to the lungs

Question 7

how does the heart pump on the left side

Answer 7

-oxygenated blood comes through the pulmonary vein into the left atrium
-it then goes down into the left atrium through a valve
-then it gets pumped out through the aorta all around the body

-left hand side is more muscular as it’s going all around the body

Question 8

double circalorty system

Answer 8

1) Pulmonary circulation
RIGHT HANDSIDE:BLOOD FLOW
-VC-> RA-> RV-> PA-> lungs
-to remove waste products
-to pick up oxygen

2) Systemic circulation
LEFT HAND SIDE: BLOOD FLOW
-PV-> LA-> LV-> A-> Body
-to provide cells with oxygen for respiration