Feeding and Digestion

Intracellular Digestion-each cell digests its own nutrients

Paramecium – a single-celled pond organism

Digestive Systems

Human Digestive System

TeethIndicateDiet

Which digestive system islonger, acarnivore oran herbivore?

WHY??

Compartments of a Cow’s Stomach

Open vs. Closed Circulatory System

Open = blood in sinuses Closed = blood is always in the heartor 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 withoxygen

Right side=unoxygenatedblood

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