Chapter 12 flashcards
Which substances are produced during respiration?
carbon dioxide and water
Which organ of the excretory system stores urine until the body is ready to
urinary bladder
During exercise, why does the heart beat faster?
to provide muscles with additional oxygen
The organ that produces hydrochloric acid in the digestive system is the __________.
stomach
What is the main function of the excretory system?
to collect and remove wastes from the body
Which parts of the respiratory system divide into smaller and smaller tubes in a pattern that resembles the branches of a tree?
bronchi
The energy your body needs comes from
food
In which excretory organ is urea produced?
liver
Red blood cells differ from white blood cells in that they
are made mostly of hemoglobin
Which of these is NOT a function of the cardiovascular system?
controlling many body processes by means of chemicals
The ____________________, or windpipe, leads from the pharynx toward the lungs.
trachea
The movement of air into and out of the lungs is called ____________________.
breathing
If blood lacks ________________, it will not be able to clot.
platelets
The number of ____________________ that you need during the day depends on your size, age, and level of activity.
calories
Urea, excess water, and other waste materials are eliminated in a watery fluid called ____________________.
urine
About 45 percent of the volume of blood is cells. The rest is platelets.
False, plasma
Urea, excess water, and other waste materials are eliminated in a watery fluid called plasma.
False, urine
The amount of water in the kidney depends on conditions inside and outside the body.
True
Bile is a part of chemical digestion because it breaks fats down into small droplets.
True
In a given volume of whole blood, there are more white blood cells than red blood cells.
False, less
