Cardiovacular System

Question 1

The cardiovascular system is a double system

Answer 1

Deoxygenated blood flows into the right atrium and then the right ventricle and to the lungs
Oxygenated blood flows into the left atrium and then the left ventricle and to the body

Question 2

Structure of the heart

Answer 2

• Muscular walls provide strong heartbeat
• Muscle on left ventricle is thicker as it needs to pump blood around the whole body
• 4 chambers to separate oxygen rich from oxygen poor
• valves to stop back-flow of blood

Question 3

Process(vavavava pattern)

Answer 3

Blood flows through the right atrium via the vena cava, atrium contracts, ventricle contracts pushing blood into pulmonary artery(to lungs),pulmonary vein pushes blood to the heart from the lungs,to the body via the aorta

Question 4

Arteries veins and capillaries

Answer 4

Arteries-thick walls,thin lumen(gap)

Capillaries-small(one cell thick-diffusion), large surface area

Veins-valves, thin walls,thick lumen(little pressure)

Question 5

Cardiovascular disease

Answer 5

Fatty deposits build up in the coronary arteries
Formation of blood clots 
Blood clot can block artery
Restrict oxygen to some cells
Cells die
Heart attack

Question 6

Cardiovascular disease risk factors

Answer 6

Smoking
High blood pressure
Too much salt or fat (high cholesterol)