3 Cardiovasc System

Question 1

What is the cardiovascular system

Answer 1

System of arteries and veins that carries blood to and waste from the major o organs and all other parts of the body
Hearts blood vessels and blood

Question 2

Blood vessels

Answer 2

Arteries, reins,capillaries I responsible forgasand nutrient exchange between blood and cells)

Question 3

What is rate and depth of breathing controlled by

Answer 3

Co 2 levels in he blood not oxygen

Question 4

Composition of blood

Answer 4

Plasma - carries cells of the blood, carries Co 2, hormones, waste, helps maintain the acidity leek in blood
Red- contains haemoglobin to carry oxygen to cells and tissues.
White - produce antibodies to fight bacteria-,
Platelets - assists in clotting

Question 5

Haemoglobin

Answer 5

’ Protein in red blood cells that carry oxygen
Made in the bone marrow
Dark purple when depleted or oxygen ( cyanosis)

Question 6

Anemia

Answer 6

Low red blood cell count caused by iron deficiency,, symptoms: tiredness anda pale complexion heart
Palpitations, shortness of breath.
Reduces the ability to transport oxygen

Question 7

Carbon monoxide poisoning

Answer 7

Haemoglobin absorbs it 200 x more easily than oxygen

Will cause hypoxia - rosy cheeks and cherry red lips r

Effects are cumulative and produced by incomplete combustin of carbon.

Can take several days to recover

Question 8

Vasoconstriction, vasodilation

Answer 8

Cold contracts, warm widens blood vessels

Question 9

Cardiac output formula

Answer 9

Cardiac output l( ml/min) =(heart rate ( beats/min) x stroke volume (ml/beat))/ 1000
Sv normally 70ml/beat
Max effective heart rate = 180bpm
5 litres/min

Question 10

What is pulse rate influenced by

Answer 10

Adrenalin, exercise, glucose concentrations in the blood