Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
41 Cards in this Set
- Front
- Back
What are the 3 components of blood and what are they suspended in? |
White blood cells; Red blood cells; Platelets and they're suspended in plasma |
|
What else does blood plasma transport? |
Waste carbon dioxide; urea and small soluble products of digestion. |
|
What do red blood cells carry? |
Oxygen |
|
What is the red pigment called in red blood cells and what does it do? |
Haemoglobin binds to oxygen. |
|
When haemoglobin binds to oxygen it creates ______________? |
Oxyhaemoglobin |
|
True or False: White blood cells are smaller than red blood cells? |
False ~ They're bigger |
|
True or False: White blood cells have a nucleus. |
True |
|
What do white blood cells do? |
They are a form of antibody and protect the body from microorganisms. |
|
What are platelets? |
They're fragments of cells that help blood to clot. |
|
What are the three different types of blood vessels? |
Arteries, veins and capillaries |
|
Do arteries carry blood to or from the the heart. |
From the heart ~ A = away |
|
Do veins carry blood to or from the the heart. |
To the heart |
|
Give 3 qualities of arteries. |
- Thick muscular walls - High pressure - Small lumin |
|
Give 3 qualities of veins. |
- Thin walls - Often have valves - Large lumins |
|
Give 3 qualities of capillaries. |
- Single cell walls - Tiny vessel - Narrow lumin |
|
What do valves prevent? |
Backflow of blood. Ensuring blood flows in the right direction. |
|
What type of circulatory system do humans have. |
Double circulatory system |
|
How do substances move between the two circulatory systems? |
They diffuse in and out of the blood in the capillaries. |
|
What are the arteries around the heart called? |
Coronary arteries |
|
What are the top chambers of the heart called? |
Atria (Left and right atrium) |
|
Deoxygenated blood enters which atrium of the heart? Via |
Right atrium ~ Vena Cava artery |
|
Deoxygenated blood enters which atrium and from which artey? |
Right atrium ~ Vena Cava artery |
|
Oxygenated blood enters which atrium and comes from which vein? |
Left atrium ~ Pulmonary Vein |
|
Deoxygenated blood leaves via which artey? |
Pulmonary Artey |
|
Oxygenated blood leaves via which artery? |
Aorta Artery |
|
What can cause coronary heart disease? |
When the arteries are narrowed by a build up on fatty deposits. |
|
What do doctors do to help stop coronary heart disease? |
Stents ~ A metal mesh inserted into the artery to widen it. |
|
What drugs are used to help cardiovascular disease? |
Statins |
|
What is a artificial pacemaker? |
A small electrical device that is used to correct irregularities in the heart rate. |
|
If heart valves are damaged what can they be replaced by? |
Biological or mechanical valves |
|
Where are your lungs? |
In your chest protected by the ribs. |
|
What is your Diaphragm? |
A strong sheet of muscle that separates your lung cavity from other internal organs. |
|
Which part of the lung is used for gas exchange and why is it efficient. |
Alveoli because they have a large supply of capillaries with a large surface area. |
|
What does air enter the lungs by? |
Trachea and the Bronchi |
|
What are the two transport tissues in plants and what do they carry? |
Xylem carries water and dissolved mineral ions from root to leaf. Phloem carries dissolved food from leaves around the plant. |
|
What is the surface tissue of a leaf called? |
Epidermal Tissue |
|
The phloem moved dissolved sugars from the leaves to the rest of the plant. What is this called? |
Translocation |
|
What do plants breathe through and what are they controlled by? |
Stomata controlled by guard cells. |
|
The loss of water though the surface of a plant is known as _____________. |
Transpiration |
|
What environmental aspects affect transpiration in plants? |
- Wind
- Temperature - Humidity - Light |
|
What factors increase the rate of photosynthesis? |
Heat, light, humidity, airflow |