(1.4)Human Systems- Digestive System

(p62-65)

Recall – 11 Human Systems

Human Digestive System

The body’s digestive system completes four tasks:

IngestionDigestionAbsorptionElimination

Ingestion

• Ingestion: Food is taken into the body.

• Once food in placed into the mouth digestion begins.

Digestion

• Digestion: Food is physically broken down into nutrients (through dissolving and breaking into smaller bits) and also broken down chemically (through chemical reactions).

Absorption

• During absorption, nutrients diffuse or are moved into the blood and carried to the cells.

• Energy from these nutrients is made available to cells through cellular respiration.

Elimination

• Elimination: Solid waste passes from the digestive system out of the body.

Organs of the Digestive System

Please label your digestive system diagram now.

Organ System Teaming

• Organ systems working together carry out important tasks in the body.

• Most tasks in the body need the support of two or more organ systems working together.

Can you identify some activities and the organ systems that work together to complete them?

Cellular Respiration

• Recall cellular respiration from last year?

• glucose + oxygen carbon dioxide + water

• It’s how the body gets its energy requirements.

Cellular Respiration

• Glucose from the digestive system• Oxygen from the respiratory system

• Circulatory system transports glucose and oxygen to cells.

• Now cells have what they need for cellular respiration.

CLASSWORK

• BLM 1-30• Text: pg. 63 “Learning Check # 1 - 3• HAND IN BEFORE THE END OF CLASS

• Quiz - 1.3 (Tissues and Organ Systems) and 1.4 (Respiratory System) tomorrow

• BIOLOGY TEST #2 TUES. JUNE 4