7C Muscles and Bones Flashcards
Breathing
The movement of muscles that allows us to take in and excrete gases.
Respiration
Process by which oxygen is used to release energy- produces carbon dioxide.
Gas Exchange
One gas is exchanged for another- oxygen goes into the blood, carbon dioxide leaves the blood.
Gas Exchange System
The organs that help with breathing / gas exchange- lungs, trachea, diaphragm.
Inhalation
The muscles in the diaphragm contract, moving it downwards. Muscles between the ribs contract, pulling the ribs up and out. Lungs increase in size allowing air to flow in.
Exhalation
The muscles in the diaphragm relax so it rises. Muscles between the ribs relax, moving the ribs down and in. Lungs decrease in size pushing air out.
Ventilation
The movement of air into and out of the lungs
Plasma
Main part of blood- the liquid part.
Red Blood Cells
Carry oxygen in the blood- haemoglobin in cells carries the oxygen.
White Blood Cells
Fight infections and keep us healthy.
Where red and white blood cells are made.
Bone Marrow
Skeleton
Formed by the bones in the body- allows for support, protection and movement.
Skull
Made up of 22 bones- protects the brain.
Connects bones together.
Ligaments
Connects muscle to bones.
Tendons
