Year 1 - Blood and Blood Transport Flashcards
What is plasma?
The liquid part of blood
What do thrombocytes react to?
React to bleeding from blood vessel injury by clumping, thereby initiation a blood clot
What to erythrocytes contain?
They contain haemoglobin, which binds oxygen for transport
What are the leucocytes?
Cells of the immune system involves with protecting the body from infectious disease
What are the ABO blood groups?
Based on having an A, B, both or no antigens on erythrocytes.
Why is the blood group O useful?
It can be donates to anyone without being rejected by the patient.
Which blood type can receive any blood type?
AB+
What is the Rheses blood type?
Determined by one common antigen; person has antigen (Rh+) or lacks the antigen (Rh-)
Who can be given blood of a AB+ person?
AB+ person
Who can receive O- blood?
Only O- people
What is the Lymphatic system?
The extensive network of vessels and nodes involves with the immune system and drainage of tissue fluid.
What is the fluid inside the lymphatic system?
Lymph
What is the spleen?
It is the largest organ of the lymphatic system
What are the purposes of the spleen?
- Contains emergency supply of blood (e.g. in case there is major bleeding)
- Contains leucocytes for fighting infections
What is the general term for “pressure of the fluid”?
Hydrostatic pressure
Why are water and small soluble molecules forces out at the atrial end of a capillary?
Hydrostatic pressure of the blood is higher than its osmotic pressure
What is the liquid that bathes tissue cells?
Tissue fluid
What are example of small soluble molecules that can leave a capillary?
Glucose, amino acids, oxygen
What are examples of things that are too large to be forced out of a capillary?
Plasma proteins; blood cells
Reasons that blood pressure falls along the length of a capillary:
- Friction of blood with the walls;
- Reduced blood volume
Where does most of the water of the tissue fluid move?
Back into the capillaries directly
Where does a small volume of water from the tissue fluid go?
It drains into lymph vessels, which then empty into the blood
What happens in some patients when their tissues swell up?
It means that tissue fluid is formed faster than it is removed
Capillaries have tiny ______, which allow small molecules to leave.
Pores
