Feeding and Digestion. Intracellular Digestion-each cell digests its own nutrients Paramecium – a single-celled pond organism.

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Presentation transcript:

Feeding and Digestion

Intracellular Digestion-each cell digests its own nutrients Paramecium – a single-celled pond organism

Digestive Systems

Human Digestive System

Teeth Indicate Diet

Which digestive system is longer, a carnivore or an herbivore? WHY??

Compartments of a Cow’s Stomach

Open vs. Closed Circulatory System Open = blood in sinuses Closed = blood is always in the heart or a blood vessel, never in sinuses.

Fish has 2-chambered heart Amphibian has 3- chambered heart Mammal has 4- chambered heart

Human Heart is 4-chambered: 2 atria and 2 ventricles Left side= blood with oxygen Right side= unoxygenated blood

Cardiovascular System- Human Circulation

Fish Respiration through Gills

Insect Respiration through Tracheae

Human Respiration through Lungs

Bird Respiration through Lungs

Male Anatomy

Female Anatomy

Female Hormones

Placenta

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