Unit 4 · 6 lessons
Animals: Structure and Function
How the digestive, respiratory and circulatory systems take in nutrients and oxygen, deliver them to every cell, and remove wastes, plus the disorders that affect them and the technologies used to study them.
- 63 practice questions
- 52 flashcards
Lessons
- 1The Digestive SystemHow mechanical and chemical digestion break food into molecules small enough to absorb, what each organ and enzyme does, and how nutrients reach the blood.10 questions
- 2The Respiratory SystemThe path air takes into the lungs, how muscles and pressure changes move air in and out, how oxygen and carbon dioxide diffuse across the alveoli, and how hemoglobin and exercise fit in.10 questions
- 3The Circulatory SystemHow the four-chambered heart and its valves pump blood through two circuits, how arteries, capillaries and veins differ, what blood is made of, and what blood pressure and heart rate measure.11 questions
- 4Dissection: How the Systems Fit TogetherA guided virtual dissection of a fetal pig: orientation terms and technique, locating the organs of the digestive, respiratory and circulatory systems, how they connect through the hepatic portal system, the diaphragm and the pulmonary circuit, and the ethics of dissection and its alternatives.10 questions
- 5Breathing, Circulation and Digestion Across the Animal KingdomHow animals solve the same three problems in different ways: gas exchange through skin, gills, tracheae and lungs; open and closed circulation with two-, three- and four-chambered hearts; and digestion from a gastrovascular cavity to crops, gizzards and the ruminant stomach.11 questions
- 6System Disorders and Medical TechnologyHow the digestive, respiratory and circulatory systems depend on each other, what goes wrong in common disorders such as asthma, emphysema, ulcers and arteriosclerosis, and how technologies like MRI, CT, endoscopes, insulin pumps and transplants help us study and treat the body.11 questions