Blood Flashcards
1
Q
What is blood?
A
- circulating liquid tissue
- adult body contains 5-6L of blood
2
Q
What are the 3 functions of blood?
A
- transport
- maintains
- protection
3
Q
What does blood transport?
A
- brings oxygen and nutrients to the body
- carry waste products away from blood cells
- distributes hormones from the endocrine glands
4
Q
What does blood maintain?
A
- maintains constant body temperature
- maintains constant PH and water
5
Q
How does blood protect?
A
- distributes antibodies and cells that help the body to defend agains infection and disease
- provides substance that form blood clots in damaged blood vessels to protect the body against blood loss
6
Q
What is plasma?
A
- liquid portion of the blood that holds the solid portion
- 55% of total blood amount is a transparent yellow fluid
7
Q
What is plasma made of?
A
- 90% water
- 10% dissolved components (hormones, nutrients, glucose, amino acids, fatty acids, vitamins, minerals, cellular wastes
8
Q
What are the 3 major blood proteins?
A
- albumin (maintains water levels in blood)
- fibrinogen (involved in blood clotting)
- globulin ( involved in body’s defense agains disease)
9
Q
What are red blood cells for?
A
- transport oxygen from lungs to all the cells
- transport carbon dioxide from cells to lungs
10
Q
What are red blood cells called?
A
Erythrocytes
11
Q
What do red blood cells do?
A
- contain hemoglobin
- contain an iron containing respiratory pigment
12
Q
How does hemoglobin work?
A
- contains iron and binds with oxygen, allowing RBC to carry oxygen
- hemoglobin is red, so that’s where RBC get name
13
Q
What is anemia?
A
- a condition where a person is hemoglobin deficient or has too few red blood cells
- causes blood to not transport enough oxygen to the cells in the body
- can be from dietary (not enough iron intake) or hereditary (sickle cell anemia)
- causes you to feel tired and weak
14
Q
What is RBC structure like?
A
- RBCs are biconcave disks with no nuclei
- no more surface area for more gas exchange (02 and CO2)
- more flexible for moving through small spaces
- short lived (100-120 days
15
Q
Where do RBC move?
A
- through liver and spleen
- broken down iron is returned to bone marrow and recycled into new hemoglobin
- every second more than 2 million RBCs die and are replaced by new ones
