Flashcards in Tissues - blood Deck (22)
What type of tissue is blood?
What 4 things is the blood made up of?
Red blood Cells
What is an erythrocyte?
A red blood cell
What are thrombocytes?
What is plasma?
Mainly water, some carried dissolved gasses, and proteins/plasma-proteins to help blood clotting/transport/defence against invading organisms
What is the matrix?
The background material in which various types of cells lie
What are RBC's/Erythrocytes?
Small cells with elastic membrane which are oval and biconcave - they distort to travel through small capillaries, have no nucleus and are packed with haemoglobin
What are the two differing bloods flowing throughout the body?
Oxygenated blood (arterial blood)
Deoxygenated blood (venous blood)
What are the three types of white blood cells?
How can we identify wbc's physically?
They contain granules in their cytoplasm
Which two wbc's are phagocytic and what does this mean?
Neutrophils and Eosinophils - capable of changing their shape and engulfing foreign bodies (e.g. bacteria/carbon particles)
What do neutrophils do?
They kill and digest bacteria and fungi - most numerous wbc and the first line of defence
What do Eosinophils do?
They attack and kill parasites/cancer cells - also help with allergic responses
What do basophils do?
Prevent blood clotting, they sound an alarm when infectious agents invade the blood, help bring about allergic reactions (e.g secrete chemicals like histamine - a marker of allergic disease)
What are lympocytes?
Small wbc's which assist in production of antibodies - made in the bone marrow, some enter the blood stream and some the lymphatic system
What is the mechanism of lymphocytes?
They assist in making antibodies which neutralise the antigens found on the surface of pathogens, preventing the microbe from multiplying
What are monocytes?
Wbc that ingests harmful foreign material, can travel to site of infection and begin phagocytosing pathogen
Structure of lymphocytes?
Smaller wbc than granulocytes - round nuclei and clear cytoplasm
What are the Granulocytes?
The three types of wbc known for containing granules in their cytoplasm and having varying shapes of nuclei, usually lobed into three segments
Structure of Monocytes?
Larger wbc than lymphocytes - large round nuclei and clear nuclei
What are thrombocytes also known as and what do they do?
Platelets - they're products of much larger cells - play a big role in blood clotting