Objectives Compare mechanical digestion with chemical digestion.

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Presentation transcript:

Objectives Compare mechanical digestion with chemical digestion. Section 1 The Digestive System Objectives Compare mechanical digestion with chemical digestion. Describe the parts and functions of the digestive system.

Digestive System at a Glance Section 1 The Digestive System Digestive System at a Glance Your digestive system break down food so that it can be used by the body. Food passes through the digestive tract. The digestive tract includes your mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus. The liver, gallbladder, pancreas, and salivary glands are also part of the digestive system.

Section 1 The Digestive System

Section 1 The Digestive System Breaking Down Food The breaking, crushing, and mashing of food is called mechanical digestion. In chemical digestion, large molecules are broken down into nutrients with the aid of enzymes.

Objectives Describe the parts and functions of the urinary system. Section 2 The Urinary System Objectives Describe the parts and functions of the urinary system. Explain how the kidneys filter blood. Describe three disorders of the urinary system.

Cleaning the Blood The Kidneys as Filters Section 2 The Urinary System Cleaning the Blood The urinary system remove waste products from your blood. The Kidneys as Filters The kidneys are a pair of organs in the urinary system that clean the blood and excrete products as urine.

Section 2 The Urinary System

Urinary System Problems Section 2 The Urinary System Urinary System Problems Bacterial Infections Bacteria can get into the bladder and ureters through the urethra and cause painful infections. Kidney Stones Salts and other wastes can collect inside the kidneys and form kidney stones. Kidney Disease Damage to nephrons can prevent normal kidney functioning and can lead to kidney disease.