Questions On The Heart And Hesrt Diseases Flashcards
(15 cards)
How are Artery’s adapted
- Thick outer wall
- narrow central tube (lumen) for blood to flow, - thick layer of muscles and elastic fibres (inside) to undergo high pressure
How are the veins adapted
Thinner walls
Large Lumen
Valves to prevent the back flow of blood
How are the capillaries adapted
Narrow lumen
1 endothelial layer thick
Where do all the blood vessels carry blood to
Artery: away from the heart (oxygenated)
Veins: towards the heart (deoxygenated)
Capillaries: connects artery’s and vain’s (both oxy and deoxy)
What is the exception in vains for ‘only carrying deoxygenated blood”
The pulmonary vain
In heart disection what are some precautions you should take
Wear appropriate protective equipment: gloves, aprons.
Ensure the heart is securely placed on the dissection tray to avoid slips with sharp instruments.
Hygiene procedure’s including disposing of materials safely and washing hands
Describe what might happen of there is a build up of plaque in the arteries
Can lead to arteries becoming clogged leading to restricted blood flow. Because of the higher blood flow from the body trying to push blood you may feel tired initially and lead to a hear atatck
What chamber of the heart is found on the upper left side
Right Atrium
What are the main valves of the heart
R/L atrium
R/L ventricle
Pulmonary vain
pulmonary artery
Aorta
Vena Cava
Name the blood vessel responsible for carrying blood back to the lungs
Pulmonary artery
What does it mean by diuble corculatory system
Mammals have a ‘double circulatory system’ as one circuit links to the heart and lungs and the other with the heart and the rest of the body
Advantages of a double circulatory system
Higher blood pressure: greater flow of blood to the tissues
What is the pacemaker
A group of cells in the top right atrium that control the heartbeat of the heart. Artificial pacemakers are electrical devices that generate electrical impulses to correct irregularities in the heartbeat
Blood pressure of all the blood vessels
Artery: high pressure firm the heart
Vein: low pressure to the heart
Capillary: low pressure
Composition of the walls for the blood vessels
Artery: thick muscles and elastin narrow lumen
Vein: thin muscle wall with wider lumen
Capillary: narrow lumen, 1 epithelial layer thick
