structure of the circulatory system (function of the circulatury system…
structure of the circulatory system
function of the circulatury system
Carries disease-fighting materials (known as antibodies) produced by the immune system
Contains cell fragments / platelets and proteins for blood clotting
Transports oxygen and nutrients (functions with respiratory and digestive systems respectively)
Distributes heat throughout the body to help regulate body temperature
Veins carry oxygen-poor blood, or deoxygenated blood, back to the heart.
Larger veins in the body also have flaps of tissue called valves
muscle contraction: muscle cells or fibers shorten in response to stimuli
Capillaries are microscopic blood vessels where the exchange of important substances and wastes occurs.
is carried away from the heart in large blood vessels called arteries.
heart is a muscular organ that is about as large as your fist and is located at the center of your chest.
different between red bold cells and white blog cells
Red blood cells: carry oxygen to all of the body cells.
red blood cells have no nuclei and live for only about 120 day.
white blood cells. Like red blood cells, white blood cells are produced in bone mar- row.
Some white blood cells recognize disease-causing organisms, such as bacteria, and alert the body that it has been invaded.
Other white blood cells produce chemicals to fight the invaders. Still, other white blood cells surround and kill the invaders.