The Blood Flashcards
What is the main job of blood?
To transport oxygen, nutrients and hormones
What is the main part of blood?
Plasma
What helps the blood to clot?
Platelets
What help to fight disease?
White blood cells
What is the job of red blood cells?
Transport oxygen, nutrients
What vessels are thick, powerful and take blood away from the heart?
Arteries
What vessels are thin, have valves and take deoxygenated blood back to the heart?
Veins
What are the smallest blood vessels?
Capillaries
What happens to blood vessels when we are too hot
Vasodilation - more warm blood flows near the surface of the skin giving a red appearance
What happens to blood vessels when we are too cold
Vasoconstriction - reduces the flow of warm blood near the surface giving the skin a pale appearance
What is the reddening of the skin called when blood vessels are dilating?
Erythema
Macrophages and lymphocytes are types of which blood cells?
White
What alternative name for platelets help blood to clot?
Thrombocytes
What chemical is released prior to vasodilation?
Histamine
What keeps the blood circulating around the body?
The heart
