QUESTIONS WITH VERIFIED ANSWERS
1. What is the cardiovascular system responsible for? - Answer>>-transporting
oxygen, hormones, nutrients and waste products around the body
2. what does the cardiovascular system consist of? - Answer>>-the heart, blood
vessels and around 5 - 7 litres of blood that it transports around the body
3. what does the heart do? - Answer>>-powers this system, pumping the blood
which carries the contents at a rate of five litres per minute
4. what are the hearts functions? - Answer>>-Transportation
Protection
Regulation
5. Heart- transportation - Answer>>-Transportation of blood (along with its
contents) to body tissue
6. Heart protection - Answer>>-white blood cells clean up debris and fight
infections; platelets and red blood cells form scabs that prevent infection and
open wounds; blood also carries antibodies to help protect from specific
infections
7. heart regulation - Answer>>-helps maintain body temperature; helps balance
the body's pH; maintains concentration of body's cells
8. what is the heart? - Answer>>-It is a four-chambered 'double pump' where
the left and right sides function separately - the right side pumps
deoxygenated blood and the left side oxygenated blood
9. Where is the heart? - Answer>>-A muscle that's located in the thoracic
region, between the lungs. Two-thirds of the heart is on the left side of the
body
10.What do blood vessels do? - Answer>>-Allow blood to travel from the heart
to every area of body and back - they are sized according to how much blood
passes through that particular area of the body. Blood travels through a
hollow area called the lumen, which is encased in a wall (thin for capillaries
, and thick for arteries). The blood vessels are lined with endothelium which
keeps blood inside of them and prevents the formation of clots
11.What do the arteries do? - Answer>>-Carry blood away from the heart,
which is usually oxygenated
12.Arteries- blood pressure - Answer>>-They have high levels of blood
pressure, as the blood is being pushed from the heart (hence the thicker
vessel walls).
13.Bigger arteries - Answer>>-Bigger arteries are more elastic, to
accommodate the pressure, whereas smaller arteries are muscular and
contract/expand to regulate blood flow.
14.What are arterioles? - Answer>>-These are narrow arteries that branch off
from the ends of arteries and carry blood to capillaries.
15.Arterioles- blood pressure - Answer>>-They have lower blood pressure as
they are greater in number, further from the heart and carry less blood per
unit - therefore, the walls are much thinner than arteries.
16.What are capillaries? - Answer>>-These are the smallest, thinnest and most
common blood vessels in the body
17.Where do capillaries run through? - Answer>>-They run through just about
every tissue in the body and connect arteries to venules
18.What happens in capillaries? - Answer>>-In capillaries, gases, nutrients and
waste products are exchanged between tissues - therefore, the endothelium is
thin to allow easier passage of materials, while still retaining blood cells
inside the vessels.
19.What is the main function of veins? - Answer>>-Return blood to the heart
20.How do veins differ from arteries in terms of wall thickness and elasticity? -
Answer>>-Veins have much thinner, less elastic walls than arteries
21.How do veins push blood back to the heart? - Answer>>-Gravity, inertia,
and skeletal muscle contractions help push blood in veins back to the heart
, 22.What is the purpose of valves in many veins? - Answer>>-Valves prevent
blood from flowing away from the heart
23.Venules - Answer>>-perform the same function as arterioles but collect
blood from capillaries, rather than deposit it.
24.what does the systemic circulation loop do? - Answer>>-Transports
oxygenated blood from the left side of the heart to all body tissue (apart
from the heart and lungs)
It also removes waste from tissue and returns deoxygenated blood to the
right side of the heart. The left atrium and left ventricle pump blood along
this loop.
25.What does the pulmonary circulation loop do? - Answer>>-Transports
deoxygenated blood from the right side of the heart to the lungs
The blood becomes re-oxygenated and is transported back to the left side of
the heart
26.What is blood pressure? - Answer>>-Blood pressure is the pressure of
circulating blood against the walls of blood vessels.
27.What is normal blood pressure? - Answer>>-Normal blood pressure is
recommended at 120 over 80mmHg; this level can help to lower the risk of
having heart disease or a stroke.
28.What does a healthy blood pressure ensure? - Answer>>-A healthy blood
pressure ensures that blood is pumped around the body efficiently, providing
energy and oxygen throughout.
29.What is hemostasis? - Answer>>-This is where blood clots and forms scabs
30.What is hemostasis controlled by? - Answer>>-It is controlled by the
platelets of the blood
31.What do platelets do? - Answer>>-Platelets remain inactive until they reach
damaged tissue and they change form to a spiky shape and become sticky in
order to hang onto damaged tissue
They then release chemicals to produce fibrin, which forms the structure for
a blood clot