[Music] hello students welcome to science class today i am going to discuss to you how to transport nutrients in the two organ systems of our body listen very carefully and jot down important details in this lesson let's get started look at the first picture do you have any idea about this organ system yes this is the respiratory system how about the second picture this is our circulatory system these are the two systems that we are going to study today now let us start first with the respiratory system respiratory system is also known as the human breathing system this organ system is responsible for taking in oxygen and expelling carbon dioxide the reason why we can breathe is because of the respiratory system now let us have the parts of the respiratory system are you ready the first one nose and mouth these are the entrance of oxygen in our body oxygen enters in our body through nose and mouth next nasal cavity or nasal passageways after the oxygen enters through our nose it will pass through nasal cavity or nasal passageways making the air warm dumb and clean of unknown particles next pharynx is our throat and larynx is our voice box next trachea trachea is also known as the windpipe it is an empty tube that serves as passageway of air into the deluxe as shown in the picture next lungs lungs are the main organs of the respiratory system humans have a pair of lungs the right and the left [Music] next bronchitis these are the two branching tubes that connect the trachea to the lungs bronchi next bronchioles these are the hair-like troops that connect to the alveoli wherein gas exchange happens again bronchi bronchioles and then alveoli so those are the parts of the respiratory system the question is what happens when we breathe in and breathe up everybody can you please inhale and exhale what do you think happens in our respiratory system let's find out what can you say about this two pictures the first picture shows the process of inhalation the second picture shows the process of exhalation can you spot some differences between the two let us see first when we inhale oxygen enters our body when we exhale carbon dioxide exits our body next when we inhale ribs move out and chest space increases our chest space becomes larger when we exhale ribs move in and chest space decreases or chest space becomes smaller next diaphragm diaphragm is a muscle in the respiratory system that helps us to breathe when we inhale diaphragm muscle contracts or our diaphragm moves down when we exhale diaphragm muscle relaxes or our diaphragm moves up so that is what happens when we breathe now let us proceed to the second organ system and that is the circulatory system circulatory system is also known as the cardiovascular system this system is the life support structure that nourishes your cells it functions with other body systems to deliver different materials in the body now let us proceed to the major parts of the circulatory system the first one of course our heart heart pumps the blood throughout the body and this is the main organ in the circulatory system next blood vessel blood vessel carries the blood throughout the body and we have three types of blood vessels the first one arteries arteries carry blood away from the heart while veins carry blood towards the heart the third type of blood vessel is capillaries these are the smallest blood vessels in the body connecting the smallest arteries to the smallest veins this is the actual site where gases and nutrients are exchanged next blood blood carries the materials throughout the body so those are the major parts of the circulatory system heart blood vessel and blood now that you already know the respiratory and the circulatory system let us have some trivia do you know how big your heart is the answer the heart is a hollow muscle which is as big as your fist everyone please look at your fist that is how big your heart is now let us take a quick look on the parts of the heart our heart has four chambers the two atria and the two ventricles the two atria the right and the left a3 are the receiving chambers of the heart they accept blood from the body and from the lungs while the two ventricles the right and the left ventricle are the pumping chambers of the heart moving blood to the lungs and into the body there is a valve between each atrium and ventricular to prevent the blood from flowing backwards the bulbs are like one-way doors that keep the blood from moving in only one direction now let us have the parts of the heart the oxygenated blood enters through superior and inferior vena cava if you know the difference between superior and inferior vena cava comment down below [Music] plot will be received by the right atrium pass through tricuspid bulb and pump by right ventricle pass through pulmonary valve and will exit to pulmonary artery going to the lungs to get oxygen it will now become oxygenated blood and will enter the pulmonary vein it will be received by left atrium pass through bicuspid valve and pat by left ventricle and pass through aortic valve and will exit to the largest artery which is aorta going to the rest of the body to deliver the oxygen that is how our heart works [Music] now let us have the key concepts on how the circulatory and the respiratory systems work together air first enters your lungs and then into the left part of the heart it is then driven by your heart into the bloodstream all the way through your body the heart pumps blood which transports essential nutrients oxygen and other chemicals to every cell in your body once it reaches cells oxygen processes the nutrients to release energy carbon dioxide is given off during the process the blood delivers carbon dioxide into the right portion of the heart from which it is bombed to relax carbon dioxide lifts your body through the lungs when you exhale so that is how respiratory and circulatory systems work together let's explore the circulatory system functions with other body systems to deliver different materials in the body it circulates vital elements such as oxygen and nutrients at the same time it also transports waste away from the body now let us explore the types of circulation in the circulatory system first one pulmonary circulation it is the movement of blood from the heart to the lungs and back to the heart that is pulmonary circuit or pulmonary circulation next coronary circulation it is the movement of blood through the tissues of the heart only that is coronary circuit or coronary circulation the last type of circulation is systemic circulation it is the movement of blood from the heart to the rest of the body upper body and lower part of the body excluding your locks that is systemic circuit or systemic circulation [Music] thank you so much for watching do not forget to like share and subscribe i hope you learned something new today please comment down if you have questions bye [Music] you