Transcript Circulatory System

Circulatory System
Read chapter 23 introduction - 23.2
Reading quiz Wed (Notes checked)
General function/purpose of the circulatory system?
Composition (components)
of blood
Blood
Solvent  carries
substances
Osmotic balance
Buffer (pH)
Osmotic balance
Buffer (pH)
Clotting
Defense
Develop from pluripotent cells in red
marrow of various bones
Stem cells that can develop into any
blood cell type or platelet forming cell
Controlled by a kidney hormone  erythropoietin
Structures (organs) of the circulatory
system
Comparison of Arteries, veins,
capillaries
Fig. 23-7c
Epithelium
Epithelium
Smooth
muscle
Connective
tissue
Capillary
Basal lamina
Valve
Epithelium
Smooth
muscle
Connective
tissue
Artery
Vein
Arteriole
Venule
Anatomy
Pulmonary Circuit
Systemic Circuit
Anatomy of Heart
How would you test changes in
circulatory rates?
Liquid portion that
carries many
dissolved materials
(proteins, ions)
Function in clotting
Function in the
immune response:
defense against
invading
microorganisms
Transport oxygen
Effects of common chemicals on
Circulatory Rates in Goldfish
Test one of each of the following
solutions
•
•
•
•
•
Nicotine
Ethanol
Acetaminophen or ibuprofen
Caffeine
Adderall
Make a hypothesis for each of the solutions above
Include in Lab Report
• Hypotheses
• Data
– Table
– Appropriate graph (line or bar?)
• Discussion (one page, double spaced)
– Hypotheses supported?
– Research chemical
– Why these results?
– Apply to your life
Bibliography
Cardiac
Cycle
Conduction
system of the
heart
Exchange of materials
• Capillaries have very thin walls
• Substances can cross through these thin walls
– Between blood and interstitial fluids
Copyright © 2009 Pearson Education, Inc.
Capillary
lumen
Capillary
wall
Interstitial
fluid
Nucleus of
epithelial
cell
Muscle Clefts between
cell
the epithelial
cells of the
capillary wall
– Blood and interstitial fluid exchange substances
– By diffusion
– By pressure flow through clefts between epithelial cells
– Blood pressure forces fluid out of capillaries at the
arterial end
– Osmotic pressure draws in fluid at the venous end
Copyright © 2009 Pearson Education, Inc.
Tissue cells
Blood
pressure
Interstitial
fluid
Osmotic
pressure
Osmotic
pressure
Arterial
end of
capillary
Net fluid
movement out
Blood
pressure
Net fluid
movement in
Venous
end of
capillary
Blood flow through capillaries can be regulated
Question: starting in the left atrium,
list in order the structures that the
blood would flow through before
returning to the left atrium