Lymphatic system Flashcards
(27 cards)
What are the only substances that can move through the wall of the blood capillaries?
WBC and plasma
What are the substances that cannot pass through the capillary walls?
RBC and some protiens
What is called the tissue fluid?
The fluid that leaks out of the blood capillaries containing some WBC and plasma that helps in exchange of oxygen, nutrients and waste materials between blood and the somatic cells.
What is called the lymphatic system?
The tissue fluid is reabsorbed back to the blood capillaries and the excess tissue fluid within the intercellular spaces connects with the blood circulatory system through a special tubular system called the lymphatic system.
What is the tissue fluid flowing throught the lymphatics is called?
Lymph
What are the main parts contained in the lymphatic system?
- Lacteals
- Lymph nodes
- Lymph capillaries
By what pressure does the lymph fluid is moved in lymph vessels?
The pressure caused by the muscles surrounding the lymph vessels.
What are the two main vessels in the lymphatic system?
- Thoratic duct
- Right lymphatic duct
What does the thoratic duct connect to?
To the left subclavian vein
What does the right lymphatic duct connect to?
To the right subclavian vein
What is the main function of the lymphatic system?
Destruction of infectious organisms like bacteria
The WBC in the lymph nodes destroy infectious organisms by phagocytosis
What happens when the lymph nodes become active?
They get swollen ( Kuddeti )
Where are the places where lymph nodes are most commonly located?
- Liver
- Heart
- Intestines
- Skin
- Armpit
- Throat
What are called coronary arteries?
The arteries that send blood to the heart muscle.
What are the main diseases assosicated with the blood circulatory system?
- Artherosclerosis
- Hypertension and hypotension
- Thrombosis
What is an essential lipid compound produced by the liver?
Chloestrol
Is cholestrol water soluble or not? How is it transported within the body?
Cholestrol is not water soluble.
It is transported as lipo-protiens by combining with protiens.
What are the two main types of lipo protiens?
HDL
LDL
Due to deposition of what lipo protien does the artheroclerosis occur?
LDL
How does artherosclerosis occur?
LDL gets deposited in the coronary artery and other arteris reducing the size of the lumen inside the arteries.
What are the effects of atherosclerosis?
Due to the blocking of the coronary artery, the blood supply to the heart is affected. Due to this, some parts of the heart will fail to function causing angina ( chest pain ). This is called heart attack.
What is called hypertension?
Due to the deposition of cholestrol inside the arteries, the size of the lumen reduces. Then the blood supply to different organs gets reduced, and the heart needs to pump blood with more pressure, this higher pressure excerted onto the artery wall is called the hypertension.
What are the causes for hypertension (2) ?
- Deposition of cholestrol in the arteries.
- Reduction of the elasticity of the artery or arteriole wall.
