biology 29 2 form and function in invertebrates
TRANSCRIPT
![Page 1: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/1.jpg)
29-2 Form and Function in Invertebrates
![Page 2: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/2.jpg)
Intracellular digestion
• Process in which food is digested inside cells
![Page 3: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/3.jpg)
Extracellular digestion
• Process in which food is broken down outside the cells in a digestive tract.
![Page 4: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/4.jpg)
Open circulatory System
• System in which blood is not always contained within a network of blood vessels
![Page 5: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/5.jpg)
Closed circulatory System
• System in which blood is contained within a network of blood vessels
![Page 6: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/6.jpg)
Hydrostatic skeleton
• Layers of circular and longitudinal muscles, together with the water in the gastrovascular cavity, that enable movement.
![Page 7: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/7.jpg)
Exoskeleton
• External skeleton; tough external covering that protects and supports the body of many invertebrates.
![Page 8: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/8.jpg)
endoskeleton
• Structural support located inside the body of an animal
![Page 9: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/9.jpg)
External fertilization
• Process in which eggs are fertilized outside the female’s body.
![Page 10: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/10.jpg)
Internal fertilization
• Process in which eggs are fertilized inside the female’s body.
![Page 11: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/11.jpg)
Key Concept
• The simplest animals break down food primarily through intracellular digestion, but more complex animals use extracellular digestion.
![Page 12: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/12.jpg)
Key concept
• Respiratory organs have large surface areas that are in contact with the air or water. Also, for diffusion to occur the respiratory surfaces must be moist.
![Page 13: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/13.jpg)
Key Concept
• Most complex animals move blood through their bodies using one or more hearts and either an open or a closed circulatory system.
![Page 14: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/14.jpg)
Key Concept
• Most animals have an excretory system that rids the body of metabolic wastes while controlling the amount of water in the tissues.
![Page 15: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/15.jpg)
Key concept
• Invertebrates show three trends in the evolution of the nervous system: centralization, cephalization, and specialization.
![Page 16: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/16.jpg)
Key Concept
• Invertebrates have one of three main kinds of skeletal systems: hydrostatic skeletons, exoskeletons, or endoskeletons.
![Page 17: Biology 29 2 form and function in invertebrates](https://reader035.vdocuments.mx/reader035/viewer/2022062420/55d545c4bb61eb11628b45d0/html5/thumbnails/17.jpg)
Key concept
• Most invertebrates reproduce sexually during at least part of their life cycle. Depending on environmental conditions, however, many invertebrates may also reproduce asexually.