Circulation Flashcards
heart
Pumps oxygenised blood around the body
Blood vessel
carry blood away from the heart
Arteries
- Carry blood away from the heart towards other organs
Veins
carry blood towards the heart
What is the function of the Capillaries?
carry blood through organs
Blood
a transport medium
How is this heart similar and different to humans?
Similar - has atrium
- has a ventricle - Blood enters via a vein and leave through artery
Difference- Only one valve
- no septum - fewer vessels
Arteries - is the blood oxygenated or deoxygenated
Oxygenated except pulmonary artery and umbilical artery
Arteries - blood pressure
high
Arteries - wall thickness
high
Arteries - lumen size
small
Arteries - valves present
no
Example of Arteries?
Aorta
Veins - is the blood usually oxygenated or deoxygenated?
Deoxygenated except pulmonary vein and umbilical vein
Veins- blood presure
Lowest
Veins - wall thickness
Thin
Veins - Lumen size
Larger
Are valves present in veins?
Yes
What is an example of a vein?
Vena cava
Capillary- blood direction
Between organs
Veins - blood direction
to the heart
Capilarites - blood oxyganated or deoxygenated
Oxygenated and deoxygenated
Capilaries - blood presuure
low
Capillaries - wall thickness
very thin
Capillaries - Lumen size
very small
Capillaries - valves present?
no
What is an example of a Capillary
- Alveoli
Which of the blood vessels carries blood containing the most oxygen
Aorta
Which of the blood vessels carries blood at the lowest pressure?
Veins
Which of these blood vessels is most suited for gas exchange? - explain your answer
capillary
- because it is one cell thick
- short diffusion distance
What can destroy bacteria in the blood and circulatory system?
Plasma, platlets
What can carries carbon dioxide in the blood and circulatory system?
Capillary and vein
What Pumps blood around the body?
Heart
Carries blood to organs in the blood and circulatory system?
arteries and capillaries
What carries blood from the organs in the blood and circulatory system?
veins
What carries oxygen in the blood and circulatory system?
red blood cells
Name the type of blood vessel which has valves.
vein
Compare the heart to other muscles in the body (i.e. what makes the heart muscle different to the rest of the body?)
it is made of cardiac muscle - never get tired - involuntary
What does the word pulmonary mean?
related to the lungs
What is the left and right side of the heart divided by?
septum
Which side of the heart has a thicker muscular wall and why?
left - needs to pump blood at a higher pressure
What is the role of valves?
to prevent backflow of blood
Describe the Plasma
Liquid part of blood, mainly water
Waht is the function of the plasma?
- carries nutients (glucose, amino acids)
- Carries waste product (carbon dioxide and water)
- Distribute heat
Describe the Platlets
the smallest cell
- fragments of other cells
What is the function of the platlets?
Release chemicals to make blood clot when we cut ourselves
What bind to oxygen in our red blood cells?
Haemoglobin
What are the function of coronary arteries?
supply the heart muscles with oxygen and nutrient
What is the name of the vessel that oxygenated blood leaves the heart from?
Aorta
What is the name of the vessel that deoxygenated blood leaves the heart from?
pulmonary artery
Which blood vessel returns blood from the rest of the body to the heart?
vena cava
What is unusual about the pulmonary artery and pulmonary vein?
arteries usually carry oxygenated blood where as the pulmonary artery carries deoxygenated/
vein usually deoxygenated where as the pulmonary vein carries oxygenated.
Normal resting heat rate?
70bpm
pulmonary circulation
deoxygenated blood is pumped to the lungs and oxygenated blood returns back to the heart
Systemic circulation
oxygenised blood is pumped to all the organs of the body and deoxygenased blood returns back to the heart.
Short term effect in exercise
- increased rate of breathing
- increase in tidal volume
Long term effect on exercise
- strong diaphragm + intercostal muscles
- increased number of alveoli
- increased in vital capillary
- increased gas exchange
- more oxygen
- more efficient removal of
co2
Hepatic portal vein
takes blood to the lungs
hepatic vein
returns blood to the heart
hepatic artery
oxygenated blood to the liver