General Science- Blood and The Circulatory System Part 2 Flashcards
What is the most common cause of death in the USA?
Heart Disease
What 2 things can Heart Disease lead to?
Heart Attack
Heart Failure
What contributes to the development of Heart Disease?
High Cholesterol
High Blood Pressure
Smoking
Lack of Exercise
Carries blood away from the heart and to the tissues.
Arteries
What are the branches of smaller arteries called?
Arterioles
Arterioles supply blood to the tissues via what?
Capillaries
Which is the only artery in the body that does not contain oxygenated blood?
Pulmonary Artery
What is the structure of an artery and why?
Thick walled.
Because they carry oxygenated blood at high blood pressure.
What carries blood to the heart from other parts of the body?
Veins
What is the structure of a vein and why?
Thinned wall.
Because they drive blood to the heart at low blood pressure.
Why do veins contain many valves?
To prevent backflow
What does the blood look like in the veins?
Dark red, deoxygenated blood.
Do veins have a pulse?
No
What is the special vein and how so?
The Pulmonary Vein
The blood is oxygenated from the lungs and goes back into the heart.
What are thin-walled vessels that are vey small in diameter?
Capillaries.
What is the function of a Capillary?
They permit exchange of materials such as Oxygen, CO2, Nutrients, and Waste between blood and the body’s cells.
Capillaries permit the exchanges with cells through what?
Diffusion
Hypertension is aka what?
High Blood Pressure
What can high blood pressure cause?
Damage to blood vessels
Damage to other parts of the body like Kidneys
What can help prevent and manage Hypertension?
Limit Salt Intake, Maintain weight, and exercising.
What does blood consist of?
Cells suspended in plasma.
What three types of cells are in the blood?
Red, White, and Platelet.
Oxygen carrying cells.
Red Blood Cells
Blood cells that fight off infection by destroying foreign organisms.
White Blood Cells
