Lesson 1 to 2 - Quarter 1

• Human Body - a magnificent masterpiece of God​Like a machine, it is complex and well—​equipped than any other form of​ organisms​
• Oxygen - a very important element our body needs
• Carbon Dioxide - must be eliminated in our body
• Respiratory System - A system​ made up of several​ parts that will​ function as a unit to​ take in oxygen and​ eliminate carbon​

  dioxide.​
• Nostrils -the entrance to the nasal passage
• Nasal Passage - line with coarse hair (cilia) that filters the air and traps microorganisms and dust particles
• Pharynx - serves as the passageway of air from the mouth to the trachea
• Larynx - allows air to pass through while keeping food and drink from blocking the airway
• Trachea - passage that connects the throat and the lungs
• Bronchial Tubes - tubes at the bottom of the trachea into each lung
• Bronchioles - small branches of te broncial tubes that leads to the alveoli.
• Alveoli - tiny air sacs in the lungs where the exchange of gases of oxygen and carbon dioxide takes place
• Diaphram - the muscles that helps your lungs pulls in air and pushes it out.
• Pleura - thin sacs that surround each lung lobe and separate your lungs from the chest walls
• Lungs - two organs that remove oxygen from the air and pass it into your blood.
• Breathing - a mechanism to layout oxygen into the bloodstream so it can be distributed to all the cells in the body
• Circulatory System - supplies the needed nutrients and other useful substances necessary for our body to function efficiently.
• Three Components of the Circulatory System:

  Blood

  Blood Vessel

  Heart
• Blood - delivers important substances such as nutrients and oxygen to the cells
• Blood Vessels - tubular structure that transports blood through the tissues and organs
• Heart - the main organ of the circulatory system
• Pulmonary Circulation - the movement of the blood from the heart to the lungs via pulmonary artery where oxygen​ diffuses to the blood,​ while carbon dioxide​ leaves the bloodstream​
• Systematic Circulation - the pathway of the​ blood from the heart to the capillaries of the different organs in the body and back to the heart​.