BIOL 111 Lecture Notes - Lecture 18: Blood Plasma, Telmatobius, Chronic Obstructive Pulmonary Disease
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BIOL 111 Full Course Notes
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Increased competition in water: crowding in small pools. New food resources on land: example: arthropods and plants. Difference between land and water as relevant to life: Clicker question: all are problems to be encountered on land except amount of oxygen (far more oxygen on land than in water) Problems on land: water needed to prevent desiccation\ Most require water for fertilization and larval development: air is less dense than water. Require more energy, more oxygen brought in and distributed: air temperature is more variable. Need to modify behavior or physiology: uv radiation more intense on land. Air has higher concentration of oxygen than water. Gases diffuse faster in air than water. Lobe-finned fishes: 2 ventral pockets formed off esophagus: used as a supplemental respiratory device. Ray-finned fishes: single dorsal pocket formed off esophagus: used as a supplementary respiratory device. Endoderm, gas bladders are pockets off the digestive tract. Stronger limbs and girdles, vertebral column, ribs.