Cardiovascular Cardiovascular SystemSystem

Vocabulary: 324Vocabulary: 324

1. brady-1. brady-2. diastol-2. diastol-3. systol-3. systol-4. tachy-4. tachy-5. ventr-5. ventr-6. embol-6. embol-

Functions/PartsFunctions/Parts

1. Exchange particles through blood 1. Exchange particles through blood flowflow

– A. Nutrients and/or electrolytesA. Nutrients and/or electrolytes– B. GasesB. Gases– C. Waste ProductsC. Waste Products

Functions/PartsFunctions/Parts

2. Pulmonary Circuit2. Pulmonary Circuit

3. Systemic Circuit3. Systemic Circuit

VesselsVessels

CLOSED CIRCUIT!!!CLOSED CIRCUIT!!!

PathwayPathway

HHAAaaccvvVVHH

Arteries and ArteriolesArteries and Arterioles

A. Strong, elastic A. Strong, elastic vessels made of:vessels made of:–Endothelium Endothelium –Smooth MuscleSmooth Muscle

B. Smooth muscle contractionB. Smooth muscle contraction–Stimulus to the muscle can Stimulus to the muscle can make two things happen.make two things happen.

1. 1. Vasoconstriction:Vasoconstriction:

Muscles Contract Muscles Contract

Vessel Diameter Vessel Diameter decreasesdecreases

2. Vasodilation2. Vasodilation

Muscles RelaxMuscles Relax

Vessel Diameter Vessel Diameter increasesincreases

CapillariesCapillaries

CapillariesCapillaries

Smallest diameter blood Smallest diameter blood vessels, made up of vessels, made up of simple squamos simple squamos endotheliumendothelium

PulmonaryPulmonary SystemicSystemic

Diffuses outDiffuses out ?? ??

Diffuses intoDiffuses into ?? ??

PulmonaryPulmonary SystemicSystemic

Diffuses outDiffuses out COCO22 OO22

NutrientsNutrients

Diffuses intoDiffuses into OO22 COCO22,,

Waste Pro.Waste Pro.

Veins and VenulesVeins and Venules

Return blood from Return blood from capillaries to the atria capillaries to the atria (heart)(heart)

Veins and VenulesVeins and Venules

A. Thinner A. Thinner walls with walls with less less developed developed musclemuscle

Veins and VenulesVeins and Venules

B. VALVESB. VALVES–One-wayOne-way–Prevent Prevent back flowback flow