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Digestive System

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by

Kyle Egan

on 12 April 2017

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Transcript of Digestive System

Digestive System
Warm-up
What are functions of these body systems...
Integumentary
Skeletal
Muscular
Organ system that
breaks up, digests,
and absorbs nutrients from food
Functions of Digestive System
Break food
into smaller pieces
Move food
Dissolve food
with enzymes
(saliva & stomach acid)
Absorb nutrients
into the blood
Organs of the Digestive System
Mouth
-
Breaks food
into smaller pieces
-
Mechanical (Physical) Digestion
-
Breaking food down into smaller pieces


-
Chemical Digestion
-
Changes composition
of food
Chew, mix, & churn
Saliva starts dissolving
Esophagus
-
Transports food
to the stomach
-
Peristalsis
- Wave-like movement to
push food down
Stomach
-
Mixes and Grinds
food
(
Mechanical digestion
)
-Adds
acid
to food
(
Chemical digestion
)
-Turns food to paste
Peristalsis moving up =
Small Intestine
-More than 20 feet long
-Continues breaking down food
with acid (
Chemical digestion
)
-
Absorbs nutrients
into the blood
Large Intestine
-Moves waste (leftovers) to be removed
-
Reabsorbs water
from leftovers
-Starts as liquid, comes out as...
something else
Warm-up
what is the function of the respiratory system?
Warm-up

3) bring oxygen into body
2) protect inside & keep warm
1) transport oxygen to body
Circulatory
Respiratory
Nervous

Integumentary - Protect, Heat
Skeletal - Move, protect, support
Muscular - Move, protect, pump blood
Circulatory - Carry Oxygen, Heat
Respiratory - Gas exchange
Nervous - Electrical messages
Macromolecules (Large molecules)
What your body is breaking down
Carbohydrates
-
Sugars
; Easiest to break down, 1st source of energy

Proteins
-
Rebuild tissues/Muscles
; take longer to break down

Lipids
-
Fats
;
HIGH energy
; Broken down during endurance activity (20+ minutes)
Rectum & Bladder
-
Storage for waste
to be removed

-Rectum holds stool

-Bladder holds urea (urine)
(Excretory System)
Organic Compounds
EQ: What are the functions of the digestive system and how does it maintain homeostasis?
Contain Carbon (C)
Digestive --> Circulatory
--> Body cells
The main elements in many organic compounds are
Carbon (C), Hydrogen (H), and Oxygen (O)
When we eat, we break down our food into organic compounds that our body can use
*
C H O
6 12 6
Ca(OH)
2
+
+
Full transcript