RED ALERT! The Circulatory System and the Blood. Blood. Blood is a heterogeneous mixture. It is a COLLOID , and has four main components Red corpuscles (red blood cells) White corpuscles (white blood cells) Plasma (fluid) Platelets. Red Blood Cells.
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Blood is a heterogeneous mixture. It is a COLLOID, and has four main components
Red corpuscles (red
White corpuscles (white blood cells)
Carry Oxygen and Carbon Dioxide with the help of Hemoglobin
They are produced in the bone marrow
They live only 3-4 months and have no nucleus
Red blood cells will have proteins which stick out. They are called Antigens
The opposite of antigens are Antibodies
If an antigen meets it’s antibody, they clump and form clots, which are BAD!!
Blood, of all types, can also have an Rh antigen on them and there is an antibody for it.
If a person has this antigen, they will have a + next to their blood type (ex: A+ means they have the A and Rh antigen)
If a person does not have this antigen, they will have a – next to their blood type (ex: A- means they only have the A antigen)
It carries Nutrients and Hormones (chemical messages) to the cells
It carries Urea and Carbon dioxide away from the cells.
Plasma suspends red and white blood cells so they can flow through the body. It also has:
- clotting factor
- antibodies and
- carries off solid waste.
Smaller than red blood cells
Responsible for clotting
Link together to form scabs when in contact with air.
White blood cells
White blood cells kill bacteria and viruses through:
Phagocytosis – eating them with help from antibodies
2) Antibodies – Latch onto bacteria/viruses
Pathogens are viruses and bacteria.
Pulmonary circulation carries blood that contains carbon dioxide TO THE LUNGS, where it gets rid of the waste and is resupplied with oxygen
Systemic circulation carries the oxygenated blood to cells in the body and supplies them with nutrients as well.
The Heart is made up of muscle tissue and has four main chambers
The right atrium
The right ventricle
The left atrium
And the left ventricle
The heart also has valves to prevent backflow of blood
The walls of the left ventricle are thicker (more muscular) than those of the right ventricle because the left ventricle has to push blood into the entire body, whereas the right ventricle only has to push blood as far as the lungs.
BLOOD ALWAYS LEAVES THE VENTRICLES, GOES THROUGH THE BODY, AND COMES BACK INTO THE ATRIUMS!!
diastolic pressure (smaller #)
p = F
The units are N/m2orPaormm of Hg
What general shape do you think our blood vessels are?
They are Cylinders!
Arteries have a bigger surface area so that they can withstand high force of heart on blood and pressure will be lower