Cardiovascular System

Question 1

Arteries

Answer 1

Transport oxygenated blood
Thick vessel walls
Smooth muscle to control diameter
Regulates flow of blood to organs
Don’t need valves
Branch from artroles

Question 2

Veins

Answer 2

Transports deoxygenated blood
Thinner vessel walls
Collapse on them selfs when low blood pressure
Has valves to prevent back flows
Usually take blood samples from
Smallest veins called venules

Question 3

Capillaries

Answer 3

Permeable to allow o2 to flow threw
Smallest of all vessels
Thin wall
Blood flows slowly and helps transfer

Question 4

What is in plasma

Answer 4

Mostly water
Plasma protiens

Question 5

What are plasma protiens

Answer 5

Albumin- produced by liver
Fibrinogen and prothrombin- produced by liver
Immunoglobulin- antibodies produced by immune system

Question 6

What does plasma transport?

Answer 6

Electrolytes
O2 and co2
Nutrients
Waste products - urea , creatinine
Hormones

Question 7

What vitamin is required to produce blood clotting factors produced by liver ?

Answer 7

Vitamin k

Question 8

How does clotting work

Answer 8

Platelets stick together and seal the damaged vessel the release an enzyme called thromboplastin.
Thromboplastin and calcium ions convert plasma protein prothrombin to active enzyme thrombin. Thrombin converts fibrinogen to fibrin, fibrin fibers go across the damaged area traps blood and causes a scab

Question 9

What’s the first branch of aorta

Answer 9

Coronary arteries