blood and lymphatic vessels Flashcards
what is it formed from
The lymphatic system is formed from a series of tubes which flow from tissues back to the heart
Lymph nodes
Lymph nodes are small clusters of lymphatic tissue found throughout the lymphatic system, especially in the neck and armpits
Lymphocytes
Lymphocytes are white blood cells that are also one of the body’s main types of immune cells. They are made in the bone marrow and found in the blood and lymph tissue
Blood consists of
Blood consists of red blood cells, white blood cells, platelets and plasma
white blood cells
White blood cells are part of the body’s immune system, defending against infection by pathogenic microorganisms
There are two main types, phagocytes and lymphocytes
functions of Plasma
Plasma is important for the transport of carbon dioxide, digested food (nutrients), urea, mineral ions, hormones and heat energy
function of red blood cells
Red blood cells transport oxygen around the body from the lungs to cells which require it for aerobic respiration
Platelets function
Platelets are involved in helping the blood to clot
How the blood clots
When the skin is broken (i.e. there is a wound) platelets arrive to stop the bleeding
A series of reactions occur within the blood plasma, The clot eventually dries and develops into a scab to protect the wound from bacteria entering