circulatory system

CIRCULATORY SYSTEM

BLOOD

Transport ◦ O2, glucose, amino

acids to cells◦ CO2 and urea from

cells to lungs and kidneys

◦ Hormone messages from endocrine gland to target

Functions of Blood

Wound Healing◦ Platelets and proteins (ex. fibrinogenfibrin)

http://www.youtube.com/watch?v=--bZUeb83uU

Functions of Blood

Heating and Cooling◦ Vasoconstriction conserves heat to core◦ Vasodilation dissipates heat at the skin surface

Functions of Blood

Immune System◦ Bacteria◦ Fungi◦ Viruses◦ Foreign tissue rejection

Functions of Blood

Plasma◦ Straw coloured◦ Water concentration varies (hydration level)◦ Makes up 55% of blood volume◦ Dissolved O2, CO2

Components of Blood

Red Blood Cells (erythrocytes)◦ Made in bone marrow◦ Squished spheres◦ No nucleus◦ Filled with hemoglobin which binds with O2

Components of Blood

White Blood Cells (leukocytes)◦ Produced in bone

marrow◦ Mature in thymus◦ Have a nucleus◦ Macrophages engulf by

phagocytosis◦ Granulocytes &

Agranulocytes◦ http://

www.youtube.com/watch?feature=player_detailpage&v=PXUNEJkjQt4

Components of Blood

Platelets (thrombocytes)◦ Cell fragments◦ Stick to wounds in the blood vessels to initiate

clot

Components of Blood

Activity D5 – Quick Lab: Blood Components

http://media.pearsoncmg.com/intl/pec/school/synapse/biologysource/biology11/shell/resource.php?resource=ACT_ch11_D5_blood.htm

Try This! Computer

Examining Blood Cells Microscope Activity

Microscopes

Blood Doping???

D6 Case Study

CIRCULATORY SYSTEMBLOOD VESSELS

Arteries carry blood away from the heart Veins carry blood to the heart Capillaries form a network between arteries

and veins to distribute materials to cells and collect waste.

Blood Vessels

Thick muscular walls Strong connective tissue Round diameter No valves High pressure

Arteries

Some muscle Some connective tissue, thicker layer than muscle Thin walls Irregular diameter Low pressure Valves prevent backflow

Veins

No muscle layer or connective tissue Walls one cell thick Medium to low pressure

Capillaries

Using the microscope draw an artery & vein!!

Microscope

Pg. 302 #1~3 Pg. 304 #1,2 Pg. 306 # 1~3 Pg. 308 #1~3 Pg. 309 #2,3,5,6,13,14,16,17

Homework