BELL WORK (Buff Binder – new page):Copy the ENTIRE question below and write your ENTIRE answer:

What two reactants (ingredients) are needed for cellular respiration?

oxygen and glucose (food)

Today’s Standard: describe the interactions that occur among [animal] systems that perform the functions of…nutrient absorption… (B.10A)

Set up today’s page…

• Page: 70• Date: 3-16-15• Title: Nutrient Absorption• Essential Question: How do animal

systems interact to absorb nutrients?

What does your body need?

•Food (carbohydrates, lipids, proteins, vitamins, minerals)

•Water

•Oxygen

NUTRIENT ABSORPTION

Digestive Respiratory Circulatory

SYSTEMS INVOLVED

DIGESTIVE SYSTEM

• Main Parts:–Mouth–Esophagus–Stomach–Small intestine–Large intestine

DIGESTIVE SYSTEM

• Main Functions:–Mouth breaks down food into smaller

pieces–Stomach acids break food into

biomolecules (carbs, lipids, proteins)–Small intestine absorbs nutrients–Large intestine absorbs excess water

RESPIRATORY SYSTEM

• Main Parts:–Nose–Mouth–Lungs–Diaphragm

RESPIRATORY SYSTEM• Main Functions:–Nose & mouth filter air as it comes in–Diaphragm contracts and relaxes to move the

lungs–Lungs expand and contract for inhaling &

exhaling–Oxygen diffuses into blood

CIRCULATORY SYSTEM

• Main Parts:–Blood vessels–Heart–Red blood cells

what’s in

red blood cells white blood cells

platelets

plasma

carbon dioxide

digested food

waste (urea)

hormones

oxygen

CIRCULATORY SYSTEM

• Main Functions:–Heart pumps blood through the body–BLOOD TRANSPORTS:• oxygen & carbon dioxide • nutrients from the digestive system

INTERACTION: Maintaining Homeostasis • Balancing glucose levels in blood

pancreas

pancreas

insulin

liver takes upglucose for storage

cellstake upglucose from blood

liver releasesglucose to blood

depress appetite

stimulatehungerglucagon

DEBRIEF:

Explain how all three systems work together for nutrient absorption in the body.Nutrients are taken in by the digestive system through food, and the respiratory system from the air. The nutrients are moved throughout the body by the circulatory system through the blood.