Cardiovascular System

Vocabulary: 324 1. brady- 2. diastol- 3. systol- 4. tachy- 5. ventr- 6. embol-

Functions/Parts A. Nutrients and/or electrolytes B. Gases 1. Exchange particles through blood flow A. Nutrients and/or electrolytes B. Gases C. Waste Products

Functions/Parts 2. Pulmonary Circuit

3. Systemic Circuit

Vessels CLOSED CIRCUIT!!!

Pathway HAacvVH

Arteries and Arterioles A. Strong, elastic vessels made of: Endothelium Smooth Muscle

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

1. Vasoconstriction: Muscles Contract Vessel Diameter decreases

2. Vasodilation Muscles Relax Vessel Diameter increases

Capillaries

Smallest diameter blood vessels, made up of simple squamos endothelium Capillaries Smallest diameter blood vessels, made up of simple squamos endothelium

Pulmonary Systemic Diffuses out ? Diffuses into

Pulmonary Systemic Diffuses out CO2 O2 Nutrients Diffuses into CO2, Waste Pro.

Return blood from capillaries to the atria (heart) Veins and Venules Return blood from capillaries to the atria (heart)

Veins and Venules A. Thinner walls with less developed muscle

Veins and Venules B. VALVES One-way Prevent back flow