1 / 7

DIGESTIVE SYSTEM

DIGESTIVE SYSTEM. Takes in Food (mouth) Breaks down food Absorbs the broken down food into the blood stream which delivers it to your tissues and organs. Mouth. CHEWING : breaks food into smaller pieces (increases surface area) “Mechanical” digestion SALIVA : slightly basic.

lawrence-acosta
Download Presentation

DIGESTIVE SYSTEM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DIGESTIVE SYSTEM • Takes in Food (mouth) • Breaks down food • Absorbs the broken down food into the blood stream which delivers it to your tissues and organs.

  2. Mouth • CHEWING: breaks food into smaller pieces (increases surface area) “Mechanical” digestion • SALIVA: slightly basic Esophagus • PERISTALSIS: muscle contraction that moves food through the digestive tract. • Moves food from mouth to stomach in 5-8 seconds.

  3. STRUCTURE: • Very muscular. It contracts to mix food, ”mechanical digestion” • Lined with millions of glands that secrete HCl (acidic) and Pepsin (enzyme) “chemical digestion” • Food stays there for 2-4 hours Stomach

  4. Small Intestine • Structure: • Muscular tube about 6m long • “Small” because of its diameter • Duodenum (first 25 cm) of small intestine…this is where enzymes from the pancreas and liver are collected.

  5. Small Intestine (cont.) • DIGESTION: • Food stays in the small intestine for 3-5 hours. • Food is moved along the intestine by Peristalsis while nutrients are absorbed into the blood stream. • Pancreas secretes enzymes that break down carbohydrates, proteins, and fats • Liver produces bile-breaks fats into small droplets (Bile is stored in the gall bladder)

  6. Large Intestine • Also known as the “Colon” • Only contains things that can’t be digested…waste • 1.5m long and 6.5cm wide • Water is absorbed here • Bacteria live in here to further break down matter

  7. Elimination • 18-24 hours in the large intestine before the feces reaches the rectum and leaves the anus. Total time it takes to digest is 24-33 hours

More Related