BIO 181 1st Edition Lecture 19Past LectureI. Human activitiesII. Carbon dioxide removalCurrent LectureI. DigestionII. Four Chamber of the Ruminant StomachIII. DigestionA. Digestion reduces food particles to molecules that can be absorbed into the blood1. Mechanical: use of teeth to breakdown food, by chewing2. chemicals: use of gasses and other secretions to breakdown nutrientsB. The digestive systems has two forms which are 1. Complete: two ways food is digested entrance and exit. 2. Incomplete, where there is only one way food enters and waste leavesC. Classification by stomach1. Monogastrics or non-ruminants – One simple stomach, mainly carnivores and omnivores 2. Ruminants – Four compartment stomach, mainly herbivoresD. Ruminant animals have four chambers of stomachs and they are mainly herbivores. 1. The use of Microbial fermentation where microbes helpdigestion of these foods and also the four chambers help them completely digest the food. 2. The mouth is used for chewing and biting, the esophagus: connects mouth to digestive chambers and that is it, while the Four Compartment Stomachs do the workIV. Anatomy of four chamber of Ruminants. 3. Rumen can hold about 40 GALLONS a) largest part of the four stomach b) filled with bacteria and protozoa These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.2. Reticulum: where food can be retargeted and brought back up for chewingand goes through the rumen againa) Liquid goes hereb) honey comb in structurec) interact with rumen to mix content3. Omasuma) grinds and squeezesb) removes some liquid4. Abomasuma) true stomach, most like human stomachb) find enzymes and acidc)B. These animals have to eat quickly to avoid predation. Quick mouth full then chewagain, allows it to get through surface area.a) chewing your cod,b) rumination: chewing, swallowing and regurgitating, continuous part of ruminants
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