Transports oxygen and nutrients throughout the body
What are the smallest blood vessels? What is their function?
blood exchanges many substances with the surrounding tissue
blood flows into larger blood vessels (veins)
What type of tissue is blood? What is it made up of?
red blood cells
white blood cells
What is the function of arteries? Do they have thick walls Why or Why not?
carry oxygenated blood away from the heart
thicker walls since there is great pressure as blood is being pumped away from the heart and throughout the body
What are veins? What is their function?
Carry deoxygenated blood towards the heart
lower pressure than arteries
largest near the heart
What tissue is the heart made up of?
Cardiac muscle tissue
What is the special function of Cardiac Muscle Tissue?
synchronized contractions and conducts electrical impulses even when not stimulated by a nerve impulse
What factors affect heartbeat?
time of day
What are the muscles and nerves covered by? What is its function?
protects heart when lungs expand and contract
allows blood to flow freely
How is breathing controlled? What effect does breathing have on heart rate?
Breathing is controlled by a part of the brain that detects the concentration of carbon dioxide in the blood. As the level of Carbon Dioxide increases, the brain sends signals to the diaphragm, the muscles between the ribs, and the heart. The breathing rate increases, and the heart beats faster.
This has the double effect of decreasing the concentration of Carbon Dioxide in the blood and increasing the available oxygen.
What is tuberculosis? How does Bacteria enter the body? What are some general symptoms? How is it diagnosed? Fatal ?