THE CIRCULATORY SYSTEM transports oxygen and nutrients throughout the body carries away wastes made up of 3 parts: blood, heart, and blood vessels. Nelson Science

1. Blood has four components: Red blood cells contain hemoglobin - binds oxygen to be transported in the body. White blood cells - fight infection in the blood. Platelets - help blood clot. Plasma - protein-rich liquid that carries the blood cells. Flow of Oxygenated and Deoxygenated Blood

2. Heart three types of tissue cardiac muscle, nerve, and connective tissue. cardiac muscle tissue - contracts to move blood throughout the body

3. Blood Vessels 3 Types: Arteries carry blood away from heart blood under high pressure, so walls are thick Veins carry blood towards heart blood under lower pressure to walls thinner 3. Capillaries tiny vessels with thin walls diffusion of gases happens between blood and cells O2 diffuses out of blood into cell, CO2 diffuses into blood from cell Interaction of Circulatory System with Other Systems

Diseases of Circulatory System coronary artery disease – can lead to a heart attack. plaque from fat, cholesterol, calcium deposits builds up plaque can block arteries to heart, cause a blood clot heart cells don’t get oxygen, tissue starts to die symptoms: tiredness, dizziness, pain or burning in chest or arms