1. Cardiovascular System (Organ Systems S7L2cde)
7th Grade Life Science
Camp Creek Middle School

2. What makes up this system?
The word cardio means heart and the word vascular means blood vessel. The Heart, Blood, and Blood Vessels make up the Cardiovascular System.
Two Main Functions
Helps main Homeostasis
(Internal System balanced)
Carries hormones throughout your body

3. Your heart is about the size of your fist.
The Heart is cardiac muscle that is separated into right and left side. The right side of the heart pumps oxygen-poor blood to the lungs. The left side of the heart pumps oxygen-rich blood to the body.
Each side of the heart has an upper chamber called the atrium and a lower chamber called the ventricle. Valves are located between the chambers and prevent blood from flowing backwards.

4. Blood Vessels
Blood travels through the body in tubes called blood vessels. There are three types of blood vessels.
Arteries – carries blood away from the heart to the body’s organs
Capillaries – a tiny blood vessel that allows an exchange between blood and cells in other tissue
Veins – carries blood to the heart

5. Two Types of Circulation
Pulmonary – the flow of blood from the heart to the lungs and back to the heart through the pulmonary arties, capillaries, and veins. Systematic – the flow of blood from the heart to all parts of the body and back to the heart.

6. Cardiovascular Problem
Issue 1
Atherosclerosis
The buildup of cholesterol inside of blood vessels causing them to become narrower affecting the flow of blood.

7. Cardiovascular Problems
Issue 2
High Blood Pressure
Hypertension is abnormally high blood pressure. The higher the blood pressure, the greater risk of a heart attack, heart failure, kidney disease, and stroke.

8. Cardiovascular Problems
Issue 3
Heart Attack
A Heart Attack occurs when heart muscle cells die and are partly damaged. Arteries that deliver oxygen to the heart may be blocked and without oxygen the muscle cells die. When enough heart muscle cells die, the heart may stop.

9. Cardiovascular Problems
Issue 4
Heart Failure
Heart Failure is when the heart cannot pump enough blood to meet the body’s needs causing the organs to be damaged.

10. Cardiovascular Problems
Heart Disease is the leading cause of death in the United States for African Americans.
Issues
Atherosclerosis
The buildup of cholesterol inside of blood vessels causing them to become narrower affecting the flow of blood.
High Blood Pressure
Hypertension is abnormally high blood pressure. The higher the blood pressure, the greater risk of a heart attack, heart failure, kidney disease, and stroke.
Heart Attack
A Heart Attack occurs when heart muscle cells die and are partly damaged. Arteries that deliver oxygen to the heart may be blocked and without oxygen the muscle cells die. When enough heart muscle cells die, the heart may stop.
Heart Failure
Heart Failure is when the heart cannot pump enough book to meet the body’s needs

11. Trivia Question: How much blood is in an Adult Human body?
Answer: 5 L
Blood is a part of the Cardiovascular System. It is a connective tissue made up of plasma, red blood cells, platelets, and white blood cells. Blood carries oxygen and nutrients to all parts of your body.
Plasma – The fluid part of the blood made up of water, minerals, nutrients, sugars, proteins, and other substances.
Red Blood Cells – take oxygen to the cells in your body
Platelets – help to repair cuts and stop bleeding
White Blood Cells – defend the body against bacteria, viruses, an other microscopic particles that can make you sick

12. Blood cont.
Your blood does more than supply your cells with oxygen and nutrients. It also helps regulate your body temperature.
Blood Types
Every person has one of four blood types:
A, B, AB, or O.