THE DIGESTIVE SYSTEM

Review! What is the level of organization from least to greatest? Define the term organ? What is one example of an organ? Define the term organ systems? What is one example of an organ system?

Today’s Goal! Today, I will be able to identify the major jobs of the digestive & excretory system and understand the function as a system of the body.

What do we know already know about the Digestive System?

Digestive System Consists of several organs. Is like a long tube running through your body Starting Point: the mouth

Digestion Chewing breaks food into smaller parts. Saliva also helps the mouth break down food. Esophagus connects the mouth to the stomach

Digestion Digestion continues as food leaves the esophagus and enters the stomach. The stomach is a flexible organ that contains enzymes that break down food into smaller parts

Absorption Next, food moves into the small intestine. Has two functions: digest and absorb Takes a couple of hours for the food to move through Now the food is a soupy mixture.

Absorption Liver – makes a substance called bile. Pancreas – makes enzymes Both bile and enzymes are used in the small intestine to break down food.

Elimination Most foods are completely digested into smaller parts that can be easily absorbed by the small intestine Large Intestine (Colon) – receives digested food that the small intestine did not absorb. The items that do not get absorbed leave the body through the rectum.

Score 4.0 The student will understand and/or be able to connect the general functions of the major systems of the human body to how they interact to maintain homeostasis. In addition to Score 3.0, in-depth inferences and applications that go beyond what was taught. Score 3.0 (Target) The student will identify and investigate the general functions of the major systems of the human body and describe ways these systems interact with each other to maintain homeostasis. No major errors or omission regarding any of the information or processes that were explicitly taught. Score 2.0 The student will understand and/or be able to identify the general functions of some of the major systems of the human body. No major errors or omissions regarding the simpler details and processes. Score 1.0 The student will understand and/or be able to name the main human body systems. With help, a partial understanding of some of the simpler details and processes and some of the more complex ideas and processes. Score 0.0 Even with help, no understanding or skill demonstrated Big Idea 14: Organization and Development of Living Organisms Standard(s): SC.6.L.14.5 Learning Goal(s): Identify and investigate the general functions of the major systems of the human body ( digestive, respiratory, circulatory, reproductive, excretory, immune, nervous, and musculoskeletal) and describe ways these systems interact with each other to maintain homeostasis.

THE EXCRETORY SYSTEM

Excretory System The excretory system removes solid, liquid, and gas waste materials from the body. The lungs, skin, liver, kidneys, and bladder are all parts of the excretory system

Excretory System The digestive and excretory systems work together to break down, absorb, and remove excess material from food.

Excretory System Lungs remove carbon dioxide (CO2) and excess water. Skin removes water and salt when you sweat

Excretory System Liver removes wastes from the blood Liver breaks down proteins, as a result, urea is formed Urea is toxic if it stays inside the body.

Excretory System Kidney's remove urea from the body by making urine Urine contains water, urea, and other waste chemicals Urine is removed from the body through a tube called the urethra.

Excretory System The rectum stores feces until it moves out of the body.

Score 4.0 The student will understand and/or be able to connect the general functions of the major systems of the human body to how they interact to maintain homeostasis. In addition to Score 3.0, in-depth inferences and applications that go beyond what was taught. Score 3.0 (Target) The student will identify and investigate the general functions of the major systems of the human body and describe ways these systems interact with each other to maintain homeostasis. No major errors or omission regarding any of the information or processes that were explicitly taught. Score 2.0 The student will understand and/or be able to identify the general functions of some of the major systems of the human body. No major errors or omissions regarding the simpler details and processes. Score 1.0 The student will understand and/or be able to name the main human body systems. With help, a partial understanding of some of the simpler details and processes and some of the more complex ideas and processes. Score 0.0 Even with help, no understanding or skill demonstrated Big Idea 14: Organization and Development of Living Organisms Standard(s): SC.6.L.14.5 Learning Goal(s): Identify and investigate the general functions of the major systems of the human body (digestive, respiratory, circulatory, reproductive, excretory, immune, nervous, and musculoskeletal) and describe ways these systems interact with each other to maintain homeostasis.