a group of cells that receives messages about the body's oxygen needs and sends out signals to adjust the heart rate is called the...
a disorder in which a person's blood pressure is consistently higher than normal is called...
walls are one cell thick
which of the following is NOT a characteristic of a vein? A. valves prevent backward flow of blood B. returns blood to the heart C. walls are one cell thick D. walls are generally thinner than those of arteries
which of the following structures pumps blood into arteries leading to the lungs? A. right atrium B. left atrium C. right ventricle D. left ventricle
the tiny vessels where oxygen moves from the red blood cells into the body cells are called _____
VALVES in the heart help control the direction of blood flow. true or false? if false, correct the capitalized word
the force of the heart's contracting ATRIA causes blood pressure. true or false? if false, correct the capitalized word
CAPILLARY walls must be very thick to withstand the high force of blood pumped by the blood. true or false? if false, correct the capitalized word
the capillaries are located in the lungs because the oxygen level of the blood increases when oxygen moves from the lungs into the blood
recall that the human circulatory system has two loops. where in the body are the capillaries located in this loop of the blood-flow pattern? explain
the oxygen level of the blood will remain high in the arteries and will decrease in the capillaries where the oxygen diffuses into the body cells
what will happen to the oxygen level as the blood enters the other loop of the blood-flow pattern? explain
which of the following does the respiratory system move into the body? A. oxygen B. glucose C. urea D. urine
the TRACHEA is a part of both the respiratory system and the digestive system. true or false? if false, correct the capitalized word
the passages that direct air into the lungs are the BRONCHI. true or false? if false, correct the capitalized word
Delivers oxygen, nutrients, removal of co2, carries waste away from cells, contains cells that fight disease, and helps regulate temperature
What are the Major functions of the circulatory system?
First, the right side is smaller because it only pumps to the lungs. The second pump goes throughout the whole body
How is the heart a pump system?
1 of them sends o2 and blood out but the 2nd returns the o2 and blood to the lungs
what does the 2 loop system do?
At the top is the Atrium (atria) and when it gets too much pressure it drops down to the ventricles
Which are the collection chambers?
The heart (pumps in a figure eight formation) goes to the Right Ventricle and up to the lungs, turns around and goes back to the left atria and then to the left ventricle and pumps to the whole body
Blood flow in the heart; describe the process?
When the blood that's low in oxygen (high in co2) flows through capillary (next to surrounding alveoli) then co2 is picked up and turns into oxygenated blood. This process is meant to make energy
what is the gas exchange process?
pharynx, nose, epiglottis, larynx, lungs, alveoli, trachea, bronchi and diaphragm
Name the words that are part of the respiratory system
pharynx epiglottis femur nose septum larynx liver lungs alveoli trachea bronchi diaphragm
trachea lungs cartilage larynx air
The ____ is a tube about 12 inches long that leads to the ______. It is help open by rings of C-shaped _____. At the top of the trachea are the vocal cords, otherwise known as the ____. Sound is made when _____ passes over these folds of tissue.
lungs alveoli diaphragm airways- trachea bronchus bronchioles
what are the major structures of the respiratory system?