The Cardiovascular System. How are materials transported through the body? What does the heart do? What’s in our blood?. Overview. The Cardiovascular System. Components : Heart Blood vessels Blood. The Cardiovascular System. The body’s transportation system Functions :
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How are materials transported through the body?
What does the heart do?
What’s in our blood?
1. The Heart
2. Blood Flow
superior vena cava
inferior vena cava
pulmonary semilunar (valve)
Looks like this!
2 separate pumps:
ONE WAY TRAFFIC!
Blood flow through the heart:
Layers of tissue
10% dissolved substances (gases, salts, nutrients, enzymes, hormones, waste products, proteins)
Red – transport O2
White – fight off bacteria and parasitesBlood
Red blood cells (RBCs) a.k.a. erythrocytes
White blood cells (WBCs) a.k.a. leukocytes