4.2 Anatomy of the Blood Flashcards
What is blood classified as?
connective tissue
What are the two portions of blood?
plasma
formed elements
What do the formed elements of blood consist of?
red blood cells
white blood cells
platelets
What is serum?
identical to plasma except the clotting proteins have been removed
How is serum made?
blood sits in a tube until it clots and the centrifuging separates the clotting factors from the liquid
What is serum used for?
lab tests
What are the functions of plasma?
buffers pH
transport large organic molecules
aids in blood clotting
maintains osmotic pressure
What is the pH of the blood supposed to be near?
7.4
What is osmotic pressure?
net pressure in the blood that moves fluid from the tissues into the circulatory system
What in the plasma help maintains osmotic pressure?
proteins
What does osmotic pressure oppose?
hydrostatic pressure
In capillaries, where does water want to flow?
back into the capillaries due to the presence of proteins
What does hydrostatic pressure do?
pushes fluid into the tissues due to the pressure from blood pumping from the heart
What are red blood cells known as?
erythrocytes
What are red blood cells?
small biconcave disks that carry oxygen
What is the most abundant cell in blood?
red blood cells
How many hemoglobin molecules does each red blood cell contain?
250 million
What does hemoglobin contain?
contains iron that combines loosely with oxygen
Where are red blood cells manufactured?
red bone marrow of skull, ribs, vertebrae, and ends of long bones
What is a feature of mature red blood cells?
anucleate
