STD – 6 th SUB – SCIENCE 11.Organ Systems Presented By -Panchal Amol Points to study 11.Organ Systems  Introduction – Organs and organ system.  The digestive system.  Some organs of the digestive system and their functions.  Respiratory system.

STD – 6 th SUB – SCIENCE 11.Organ Systems Presented By -Panchal Amol Introduction – Organs and organ system 1.We can not say that single specific organ carries out a body function. 2.The function is carried out by number of organs working together. 3.Organ system – 1. A group of organs working together to carry out common body function is called Organ system. 2. Respiration, digestion, circulation, excretion and reproduction are the common body function.

Functions are carried out by a number of organs working together as a group.

ORGAN SYSTEM A group of organs working together to carry out a common bodily function is called an organ system.

Question time ? 1) What is digestion of food ?

 The digestive system. The group of organs working together to carry out common body function is called the digestive system.

Organs of the Alimentary Canal  Mouth  Pharynx  Esophagus  Stomach  Small intestine  Large intestine  Anus

Mouth  Lips  Teeth  Tongue

Stomach Slide 14.15a  Located on the left side of the abdominal cavity  Food enters at the cardioesophageal sphincter

Stomach

Stomach Functions  Acts as a storage tank for food  Site of food breakdown  Chemical breakdown of protein begins  Delivers chyme (processed food) to the small intestine

Chemical Digestion in the Small Intestine Figure 14.6

Large Intestine  Larger in diameter, but shorter than the small intestine  Frames the internal abdomen

Large Intestine

Functions of the Large Intestine  Absorption of water  Eliminates indigestible food from the body as feces  Does not participate in digestion of food  Goblet cells produce mucus to act as a lubricant

Question Hour. Q1) Name some organ systems in the human body. Ans- Respiration, Digestion, Circulation, Q2) Where are salivary glands located? Ans- Salivary glands located near throat and the ears

STD – 6 th SUB – SCIENCE 11.Organ Systems Presented By -Panchal Amol Respiratory system Inhalation – Taking oxygen from the air inside the body. Exhalation – To leaving out carbon dioxide from the body. Breathing - Inhalation and exhalation togetherly called Breathing. *The nose, trachea, lungs, diaphragm the rib-cage are the parts of Respiratory system.

Oxygen Cell Hi I am O 2,you can call me oxygen, and I will be your guide today. I advise you keep all feet and hands inside the ride at all times.

Respiratory Intro You may be asking, what is the Respiratory system? Well, the Respiratory system is the system that helps you breath in and out, so oxygen (0 2 ) can be pumped through your body and carbon dioxide (CO 2 ) can be removed from the blood stream. You must remember that the Respiratory system is made up of many different organs.

Welcome Now we will begin our tour. Welcome to… MB

Nasal Cavity Nose Mouth Bronchus Bronchiole Alveolus Diaphragm Throat (pharynx) Windpipe (Trachea) Left lungs Rib s

This is where it all begins. This is where the oxygen first enters your body and also where Carbon Dioxide leaves. The Nose and Mouth

When the air comes into your nose it gets filtered by tiny hairs and it is moistened by the mucus that is in your nose. Your sinuses also help out with your Respiratory System. They help to moisten and heat the air that you breath. Air can also get into your body through your mouth/oral cavity but air is not filtered as much when it enters in through your mouth.

Nose and Mouth Picture Nasal Cavity Nostril Oral Cavity Pharynx Here is a picture of your nasal and oral cavity.

The Pharynx and Trachea Next we will head down to your pharynx (throat) and your trachea (windpipe). This is where the air passes from your nose to your bronchi tubes and lungs.

The Pharynx and Trachea Your pharynx (throat) gathers air after it passes through your nose and then the air is passed down to your trachea (windpipe). Your trachea is held open by “incomplete rings of cartilage.” Without these rings your trachea might close off and air would not be able to get to and from your lungs. Pharynx (Throat) Mouth Trachea

The Bronchi Tubes and Bronchiole These bronchi tubes split up, like tree branches, and get smaller and smaller inside your lungs. The air flows past your bronchi tubes and into your bronchiole. These tubes keep getting smaller and smaller until they finally end with small air sacs (called alveoli). But we will go there later…

Alveoli and Bronchi Picture Trachea Bronchi Tubes Bronchiole Alveoli

Now we will head over to the alveoli and what happens when the air finally makes it down there. The Alveoli and Capillary Network

Your alveoli are tiny air sacs that fill up with air/oxygen when you breath in. Your alveoli are surrounded by many tiny blood vessels called capillaries. The walls of your alveoli (and capillaries) are so thin that the oxygen or carbon dioxide can pass through them, traveling right into, or out of your blood stream.

Alveoli Picture Here is a close up picture of your Alveoli and a Capillary surrounding it. Capillary Red Blood Cell Oxygen is picked up Carbon Dioxide is dropped off Wall of the air sac

Alveolus Bronchiole Respiratory Bronchiole Alveolar Duct Alveolar Sac Capillaries

Cool pictures

Diagram of Diaphragm

Here is an experiment that you can try.

Respiratory Overview Review CO 2 JH The Pharynx, or throat, is located where passages from the nose and mouth came together. Air Passing over the mucus membrane of the nasal cavity is moistened, warmed, and filtered Inside the lungs the Bronchi branch into small tubes called bronchioles At the end of the bronchioles are bunches of alveoli, air sacs, arranged like grapes on a stem Air enters the trachea, or wind pipe which leads to and from the lungs The trachea divides into two tubes called bronchi If one lobe is injured or diseased, the other lobes may be able to function normally