SOCI 1001 Lecture Notes - Lecture 12: Spruce Grouse, Ruffed Grouse, Radula
18 Nov 2018
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Freshwater sponges are found in dow"s lake and are animals that filter feed. Bugs have probing mouthparts called stylets: they help the animal feed on sap, some aphids are sucking bugs (sucking on plants to get the sap) Plant tissues are another major source of food. But plant tissues are hard to eat because of tough structural components: challenge 1: dealing with the plant tissues outside of the body: ingesting. Slugs and snails break off plant tissues with a radula, which is a very tiny. Chainsaw-like part of the mouth that helps cut up plant parts. Some caterpillars actually eat leaves from the inside! Their teeth never stop growing, and they self-sharpen. The outer layers of the teeth have enamel, and it gets its orange colour from the high level of iron on it. Cheek teeth grind the food and are powered by large masseters. Most animals have upper and lower sets of incisors.
