Chapter_42_cont_d

Chapter_42_cont_d - Chapter 42 contd Respiration Cellular...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 42 contd Respiration Cellular respiration 1. done by mitochondria 2. requires oxygen 3. generates carbon dioxide as a waste 4. ATP (energy) generated during this process Respiratory System 1. requires large, moist surface area 2. blood & external environment interact 3. exchange of O 2 and CO 2 4. gases dissolve in moisture easier, then exchange Evolution of respiratory systems Evolution of respiratory systems 1. no respiratory or circulatory system. Small, thin animals in moist environments (nematodes or flatworms; large, moist external surface area for gas exchange) marine flatworm jellyfish sponge Evolution of respiratory systems 1. no respiratory or circulatory system 2. circulatory but no respiratory system. Earthworms have well-developed, closed circulatory systems to carry gases throughout their bodies. Still rely on diffusion in/out of circulatory system through moist skin surface. earthworm Evolution of respiratory systems 1. no respiratory or circulatory system 2. circulatory but no respiratory system 3. respiratory and circulatory systems Dont need moist exterior, but surface where gas exchange occurs (lungs) is still moist to help diffuse gases Evolution of respiratory systems 1. no respiratory or circulatory system 2. circulatory but no respiratory system 3. respiratory and circulatory systems bulk flow (large amounts over long distances) Evolution of respiratory systems 1. no respiratory or circulatory system 2. circulatory but no respiratory system 3. respiratory and circulatory systems bulk flow diffusion (individual molecules over short distances, <<< 1mm) Fig. 42.6 Evolution of respiratory systems 1. no respiratory or circulatory system 2. circulatory but no respiratory system 3. respiratory and circulatory systems Bulk flow Diffusion Three types: Three types:...
View Full Document

Page1 / 61

Chapter_42_cont_d - Chapter 42 contd Respiration Cellular...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online