biology body systems Flashcards
(45 cards)
What is the difference between breathing and respiration?
Breathing is the process of inhaling and exhaling, getting air into and out of the lungs. Respiration occurs at a cellular level.
What are 3 functions of the respiratory system?
Allows o2 and co2 out of our body
Allows o2 into our blood
Allows co2 out of our blood
Allows for cellular respiration to occur
What is the respiratory surface?
The surface where gas exchange takes place
What is the diaphragm?
A mussel that forms the chest cavity, separates the lungs
What is the respiratory surface in humans what makes it up?
The walls of the alveoli which are one cell thick
What are the 4 phases of respiration?
Breathing external respiration circulation internal respiration
What is breathing controlled by?
The respiratory centre
Name 3 respiratory diseases?
Asthma, bronchitis, lung cancer, emphysema,pneumonia
What is the mucous membrane?
Made up of ciliates epithelial cells, traps bacteria, dust, and other particles in the air.
What is digestion?
The process where food molecules are broken don
What I extra cellular digestion?
The process that causes food to move through the digestive tube
What are the 3 fluids in the small intestine?
Bile, pancreatic juice, and intestinal juices
What is the end product of digestion?
Feces
Why does food have to be digested?
The nutrient molecules in food are to large to pass through the cell membrane
What are 3 mechanisms that stimulate the flow of gastric juice?
The thought sight smell or taste, food touching the lining, and when’s food mass enters the stomach
What happens during absorbrion?
Digested nutrients pass through the epithelial cells and enter either the capillaries or the lacteal. Absorbtion involves both diffusion and active transport.
What are the 3 main functions of the large intestine?
The re absorbtion of water, the absorbtion of vitamins produced by bacteria, and the elimination of undigested and Indigested material
What is a villus?
Within each villus is a network of blood capillaries and in the centre is the lacteal.
What are the 3 functions of the digestive system?
Energy, growth and repair
What is the main function of the digestive system?
Get food into our bodies wand transport it by mechanical and chemical process so it can be used in our bodies
What are the organs part of chemical digestion?
Pancreas and salivary glands
What are the organs part of mechanical digestion?
Teeth, tongue, mouth, liver, esophagus
What organs are part of absorbtion?
Large and small intestine
What is different about the left and right lungs?
They have two lobs on the left and 3 on the right