Paper 1 - Anatomy and Physiology (part 2) Flashcards
Where is the Aorta in the heart?
Where is the Pulmonary Vein in the heart?
Where is the Pulmonary Artery in the heart?
Where is the Vena Cava in the heart?
Where is the Left Atrium in the heart?
Where is the Left Ventricle in the heart?
Where is the Right Atrium in the heart?
Where is the Right Ventricle in the heart?
Where is the Tricuspid Valve in the heart?
Where is the Bicuspid Valve in the heart?
Where is the Semi-lunar Valve in the heart?
What’s the 2 main functions of the cardiovascular system?
- Transport of substances
- Temperature control
Explain how the Cardiovascular system Transports substances?
In the bloodstream e.g. Co2, O2 & nutrients (like glucose).
This gives the muscles what they need to release energy to move during exercise(& takes away any waste products)
Explain how the Cardiovascular system maintains a constant Temperature?
Vasodilation - Moving blood nearer to the skin cools the body more quickly
This means you can exercise for a long time without overheating
What are the main parts of the Cardiovascular System?
- Heart
- Blood
- Blood vessels
What are the main parts of the Cardiovascular System?
- Heart
- Blood
- Blood vessels
What is a Double Circulatory System?
A circulatory system where blood passes through the heart twice and has two different circuits
Give an example of a double circulatory system:
The Cardiovascular System
What are the main parts of the Cardiovascular System?
- Heart
- Blood
- Blood vessels
What 2 circuits is the Cardiovascular system made up of?
- Pulmonary circuit
- Systemic circuit
What is the Pulmonary circuit made up of?
Lungs & the Heart
What is the Systemic circuit made up of?
Rest of the body & Heart
Describe the path of the pulmonary circuit:
Deoxygenated blood
- Tricuspid valve
- Right ventricle
- Right semi-lunar valve
- Pulmonary artery
- Lungs
Blood becomes Oxygenated
- Pulmonary Veins
- Left Atrium
Describe the path of the Systemic circuit:
Oxygenated blood
- Bicuspid Valve
- Left Ventricle
- Left semi-lunar valve
- Aorta
- Rest of body
Deoxygenated blood
- Vena Cava
- Right Atrium
What does blood deliver to the working muscles during physical activity?
Oxygen & Glucose
What’s the 3 different types of Blood Vessels?
- Arteries
- Veins
- Capillaries
What is main the purpose of Arteries?
To carry oxygenated blood away from the heart
Which Artery is the only one to carry deoxygenated blood?
Pulmonary Artery
Describe the structure of Arteries:
- Thick, Muscular Walls
- Carries blood @ high pressure
Describe the structure of Veins:
- Has Valves
- Thinner walls & Less muscle than arteries
- Carries blood @ low pressure
What is main the purpose of Veins?
Carries blood towards the heart
What is main the purpose of Capillaries?
Carries blood through the body to exchange gases & nutrients with the body’s tissues
Describe the structure of Capillaries:
- One cell thick walls
- Very narrow - So a large surface area
*Blood flows through slowly
Why does blood move slowly through Capillaries?
So it can gave more time for gas exchange
What is Heart rate?
The No* of times your heart beats per min
What is an adults average resting heart rate?
60 - 80 bpm
What is Stroke Volume?
The amount of blood each ventricle pumps with each contraction
What is Cardiac output?
The volume of blood pumped by a ventricle per min
What is the formula for Cardiac output?
Cardiac output = Heart rate x Stroke volume
What is Haemoglobin?
A protein in the red blood cells that stores O2 & Co2
What is the purpose of red blood cells?
- To also carry Co2 to the lungs
- To carry O2 & transport it around the body
This is to it can be used to release energy needed by the working muscles
What is the pathway of air through the respiratory system?
- mouth or nose
- trachea
- bronchi
- bronchiole
- alveoli
The process of breathing is aided by which 2 muscles?
- Diaphragm
- Intercostal muscles
What is the diaphragm & intercostal muscles also known as?
The respiratory muscles
Describe what happens when you breathe in (in terms of the diaphragm & intercostal muscles)
- The diaphragm & intercostal muscles contract
—> To move ribcage upwards & to expand the chest cavity
—> Draws air into your lungs
Describe what happens when you breathe out (in terms of the diaphragm & intercostal muscles)
- The diaphragm & intercostal muscles relax
—> To move ribcage down & to shrink the chest cavity
—> Forces air out of your lungs
Where does gas exchange occur in the respiratory system?
Alveoli