Digestive system
This presentation is the property of its rightful owner.
Sponsored Links
1 / 7

Digestive system PowerPoint PPT Presentation


  • 58 Views
  • Uploaded on
  • Presentation posted in: General

Digestive system. Function : Converts food into nutrients (macromolecules) that can be used by cells Absorbs food Eliminates wastes. Invertebrate organs : mouth, gastrovascular cavity, digestive sac, gizzard, crop,and intestines Main Vertebrate organs :

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Digestive system

Digestive system

  • Function:

    • Converts food into nutrients (macromolecules) that can be used by cells

    • Absorbs food

    • Eliminates wastes

  • Invertebrate organs:

    • mouth, gastrovascular cavity, digestive sac, gizzard, crop,and intestines

  • Main Vertebrate organs:

    • Mouth, pharynx, esophagus, stomach, small and large intestines, rectum


Digestion pathway

Digestion Pathway


Feeding

Feeding

  • Most animals do not absorb food; instead they ingest it.

  • Animals range from filter feeders and herbivores to carnivores, and from commensalites to parasites.

  • All animals have developed different mouth structures and different digestive systems based on food and environmental adaptations.


Figure 29 8 invertebrate digestive systems

Figure 29–8 Invertebrate Digestive Systems

Section 29-2

Intestine

Gizzard

Crop

Mouth/anus

Pharynx

Mouth

Gastrovascularcavity

Annelid

Anus

Gastrovascularcavity

Cnidarian

Arthropod

Crop

Pharynx

Anus

Pharynx

Mouth

Rectum

Mouth/anus

Stomachanddigestive glands

Flatworm

Intestine


Figure 33 8 the digestive systems of vertebrates

Figure 33–8: The Digestive Systems of Vertebrates

Shark

Salamander

Lizard

Pigeon

Cow

Esophagus

Stomach

Intestine

Liver

Gallbladder

Pancreas

Cloaca

Crop

Gizzard

Cecum

Rectum

Compare the digestive tracts of herbivores and carnivores?


Figure 38 10 the human digestive system pg 979

Mouth

Pharynx

Salivary glands

Esophagus

Liver

Stomach

Pancreas (behind stomach)

Gallbladder (behind liver)

Large intestine

Small intestine

Rectum

Figure 38–10:The Human Digestive System (pg. 979)

How are macromolecules transported to the cells of your body? Hint: name the body system


Small intestine

The small intestine is where nutrients are absorbed from chyme (chewed –up food from the stomach).

Special structures in the small intestine called villi help absorb the essential nutrients from chyme.

Circular folds

Epithelial cells

Villi

Capillaries

Lacteal

Vein

Artery

Small intestine

Why does the small intestine have circular folds?

Hint: the mitochondria and chloroplast have folds for the same reason.


  • Login