1. Take out the homework from yesterday:
2/6/19
Take out the homework from yesterday:
Describe the functions of blood
I will be stamping them
This is page 41
The Chapter 17 targets are page 39

2. Blood 17

3. Functions of Blood
Substance distribution (transportation)
It moves: hormones, oxygen, nutrients & wastes
Regulation
Maintains: Temperature, pH and blood volume
Body protection
prevent blood loss
Fights infections

4. Blood is the body’s only fluid tissue
Composition of Blood
Blood is the body’s only fluid tissue
It is composed of liquid plasma and formed elements
Formed elements include (cells):
Erythrocytes, or red blood cells (RBCs)
Leukocytes, or white blood cells (WBCs)
Platelets
Hematocrit – the percentage of RBCs out of the total blood volume

5. Blood Plasma Plasma is mostly water (90%)
Blood plasma contains over 100 solutes, including:
Proteins –
Nonprotein nitrogenous substances – (products of metabolism)
Organic nutrients
Electrolytes
Respiratory gases

6. Take out your page(s) 40 for me to check for questions
2/6
Take out your page(s) 40 for me to check for questions
Complete the CFA

7. Plasma and formed elements
CFA answers
Plasma and formed elements
Liquid, mostly water, things dissolved in it
Platelets, red blood cells (erythrocytes), White blood cell (leukocytes)
1: Distribution/transport/moves things
2: protection
3. regulation/maintains things

8. Set up a new page of notes: page 43
EQ:
What are the formed elements and what are their functions?

9. Erythrocytes (Red Blood Cells: RBC)
Filled with hemoglobin (Hb), a protein that functions in gas transport
Transport gases (O2 and CO2)
do not consume the oxygen they transport
have no nucleus, essentially no organelles
notes

10. Leukocytes (White Blood Cells: WBC)
only blood components that are complete cells:
Are less numerous than RBCs
Can leave capillaries and move through tissue spaces
Fight infections from bacterial or viral invasion
Make up 1% of the total blood volume
Grouped into granulocytes and agranulocytes
notes

11. Platelets
notes
Fragments of cells
Platelets function in the clotting mechanism by forming a temporary plug
Platelets not involved in clotting are kept inactive by other molecules

12. I’ve cut myself!
New EQ and new page: Page 45
EQ: How am I not bleeding to death?

13. A series of reactions designed to stop bleeding
Hemostasis
A series of reactions designed to stop bleeding
During hemostasis, three phases occur in rapid sequence
Vascular spasms
Platelet plug formation
Coagulation (blood clotting)
notes

14. With a partner: Stages of hemostasis
Use a book to place the stages/steps found in the envelope of hemostasis is correct order

15. Vascular Spasms (step one)
immediate vasoconstriction in response to injury
Narrowing of the vessels
Reduces blood loss

16. Platelet Plug Formation (step Two)
Upon damage to blood vessel lining platelets:
adhere to collagen
Stick to exposed collagen fibers and form a platelet plug
Release chemicals which attract still more platelets

17. Coagulation (step three)
A set of reactions that transforms blood from a liquid to a gel
Series of reactions that cause one chemical to create another in a domino effect
The final three steps of this series of reactions are:
Prothrombin activator is formed
Prothrombin is converted into thrombin
Thrombin causes fibrinogen to convert into a fibrin mesh